Free faction transfers will help speed up the rebalance… but remember, no one will move factions without incentive.
If the alliance is still lame and perceived as pathetic by the community because the devs have made them the loser faction and put all the cool stuff on the horde, including the coolest alliance stuff like the high elves’ stuff and the night elven civilization stuff - then people aren’t going to move.
You’d have free faction transfer and no one going anywhere - so while free faction transfers could potentially help, they won’t do a thing without more fundamental changes to the alliance.
The Alliance
Rise of the Kaldorei
Now restore the alliance, bring the High elves back properly, let the Kaldorei rise again into their fullness having both pre-sundering civilization elements like Suramar, the Highborne, Moonguard shining in addition to long vigil elements like the druids, wardens and sentinels - then you create something exciting and very attractive for players - no more nerfed night elves, but an elven group restoring that original attraction? Imagine night elves finally and permanently regaining their immortality, originally an attractive and defining feature, their Well of Eternity once more being used to advance their race rather than passively unused in this hour they need it the most to rise after the decimation of the War of Thorns. Their best arcane minds, nature minds, divine minds, even the fel ones and martial warden and sentinel ones working together despite their very different lifestyles to provide powerful parties with powerful unites that overcome emphatically desperate odds and showcase them to be the titanic race spoken about in the WC3 manual.
This would excite alliance fans. A capital like Suramar, a world tree like Shaladrassil healed, with their ancestral Well of Eternity restoring their essence with Elune’s night warrior stuff this brings all the cool elements of the Night elf race to bear in the present leading to them kickass and being very attractive in a way that has been denied them throughout wow… it would excite players alot.
Making their models properly attractive would also help - the Night Elf male model , getting younger and handsome face options, fixing the neck posture, giving players the option to alter the size of those fore arms and waist so they can get a better proportioned being.
Return of the High Elves
You need work done on the alliance, not just night elves, the High elves returning in glory and emphatically would be a powerful incentive, but you don’t stop there, yo have to write them in properly, a major boost for the alliance with humans, high elves and dwarves working together on one front ( a fantasy long coveted and long denied - until now would also generate excitement even if blood elves remain working for the horde, it will certainly answer what the alliance fans have wanted for a long time but most had given up on). On another front it’s all kaldorei, and on a third front you see improvements and better showcasing of Draenei, Dwarves, Gnomes and Worgen.
Time to show case the elves on the alliance and the other races, make it exciting… the alliance didn’t need humanity to consume everything, it needed to shine with humans, elves, dwarves etc working together in the original triune coalition everyone who played the original RTS knew the alliance to be.
New factions like night elves could have their major plots and involvement and relevance, while single races like Draenei, Dwarves, Gnomes, worgen each get better attention woven into the story of the 3 main races.
All Other Alliance Races Get Improved
Draenei can have a lot going on with Night elves, while Lightforged see a lot more involvement in human and high elven affairs.
Dwarves can be much better written, rising to a powerful and important role - kinda like we saw in the Hobbit movies or in Warhammer who write their dwarves well.
Gnomes can be to Dwarves what Draenei are to Night elves - a good, solid and important friend ally.
Worgen can be expanded, you have Gilnean worgen very invested with humans and Northern Eastern Kingdoms Gilneans, war and complications with undead and the new state of affairs in Lordaeron (more on that later). But there is room for Kaldorei worgen, the embodiment of the nature side of the Night elves, just as the Highborne especially the Night elven Shal’dorei in Suramar that turned to the alliance were the embodiment of the arcane side of the Night elves, and you can show a purer long vigil nature side through them, just as Suramar reflects the arcane side, then show how the priesthood mixes with either group. These can be the Worgen sub-race, and they could be interesting… what if they were the group that was in the Emerald Dream sealed away by Malfurion but finally released by the Druid class champion in Legion, but they had evolved a little bit. They were half night elven with customisable animal features in their elven form, some had goat legs, some had bird wing arms, some had cat claw paws on their hands and feet - but the interesting part is their “worgen” form has choices - you can either be a wolf man (i.e. Worgen), or a bird man (similar to High Arakoa) or cat man (think Panther version of Saberon) and customise this in character creation.
This would make the alliance interesting, dynamic, enticing, and people will want to play it.
The Horde
They’ll need to face lift the alliance properly to generate this excitement well. The horde already is exciting, but the loss of the high elven parts of the Blood elves and the Night elven civilization parts of the Nightborne will necessitate a stimulus package with some exciting upgrades for the horde too. While I expect the Alliance to be very excited for getting the high elves back and the Night elves rising etc, some in the horde will hate losing the high elves and night elven civilizations back to them, but the horde will get improvements,. in the first wave it will focus on more orc assets - one of my favourite suggestions is a Grommash or Warsong City , the best feat of Mag’har (iron horde) engineering and infrastructure in Borean Tundra, then the bringing in of the Drakkari trolls and off course all of Zul’drak, the Amani too, now that Quel’thalas is alliance again and those blood elves operating as high elves once more, , the remaining blood elves want them out as much as the Amani do, but the Amani are the numerous and strong force, also there is Zul’farak which would look cool in it’s new model, and Un’goro gets developed for the horde. Bringing back Kezan, Lost Isles even new goblin city Undermine could be very exciting if they are done well.
That’s 4 powerful zones and assets for losing two. I would also see the Forsaken gain control of the undead in Icecrown, as well as Icecrown Citadel city - Lordaeron has a mixed fate, the humans are back, but so are the undead, under Calia there is some sort of cohabitation outside faction lines, it generates a new society there that has influences of both factions and can be an interesting area of development. the horde forsaken are capitalled in Northrend with Icecrown their main stronghold but also strongholds in many zones like Dragonblight, howling Fjord, and Borean, these fly the horde banner. They also take over the ruins of Theramore on Kalimdor - but Lordaeron is a place for all.
Wave 2 Horde Improvements
That’s wave 1 of horde improvements, wave 2 comes a bit later on. As the alliance continue to get awesome developments outlined above, the horde keeps abreast with Nightborne and Blood elves that remained horde getting new developments, blood elves delving into blood magic, especially with blood crystals, Fel magic with Illidari blood elves, Nether magic etc - new stronghold in Azshara, Bloodmyst isles, Netherstorm and outland’s Hellfire come to them. The San’lyan also become an allied race. The San’layn/Darkfallen while elven are as far from the high elves as the forsaken are from the humans, and the new development of the blood elves comes with new architecture. They no longer build like they did as High elves, so nothing like Silvermoon, it’s new, it’s cool, but it’s different - just like the Naga stuff is different from the Kaldorei pre-sundering stuff.
Same with the Nightborne, they also make developments, time magic (chronomancy) allows a different type of evolution to be accelerated and guided, maybe even Elisande has a role there, their mastery of displacement magic , chrono magic, and night magic as well as some fusion collaboration with Naga out of desperation allows them to get new customisations with Naga elements, customisations reflecting new Chronomagic and night magic developments. Like the blood elves, these Nightborne develop new architecture and assets that are different from the kaldorei civilization, so nothing that looks like Darnassus or Suramar or Zin’Azshari or Eldre’thalas - it could be some adaptation of the naga stuff into a very cool but very different type of city. New zones for them could include risen Naz’jatar and Desolace, possibly even Feralas.
Another alternative is that blizzard intertwine the Blood elves and Nightborne remnants very tightly and they now get a shared new destiny, unique development that has versions for the blood elf model and the Nightborne one, they are two races, but they develop a shared new architecture and live together. Sort of like Dwarves and Gnomes use to, or Trolls use to live with orcs. They feel more like two versions of one group, different races but together, minimising the elven influence on the horde further even if it is no longer alliance based.
Conclusions
These are just my thoughts on things they could do that will make the Alliance attractive and make people want to transfer without forgetting the horde. Timing is everything off course. you want to start with the exciting alliance developments first so people start moving to blue before you also introduce the horde ones, giving incentives to keep at the horde. if you open Free transfers at this point you announce/release the high elves returning and start the Kaldorei’s rise developments, you’d have people wanting to move over when they see the stuff done well and the alliance cool
This will even out the numbers quickly, and the horde will not feel deprived or cheated once they see the stuff coming in for the Mag’har, the other Troll groups like the Drakkari and Amani cities, zones and playable allied race, Forsaken improvement. goblins getting back Kezan and Lost isles with new quests and now able to visit them, maybe even undermine city coming later down the line.
In time the alliance will see greater developments to the kaldorei, high elves, the draenei , the worgen and it’s kaldorei worgen sub-race etc, and that is countered by the new development for the blood elves and Nightborne that allows them now to be very different from the alliance, no longer having high elven and night elven civilization elements but a new type of blood elven state and nightborne state that is independent, unique, fits the horde better too.