What would make the alliance more popular?

[Retributor-draenor (Retributor)]

At this moment in time only this can fix it.

Solution to faction imbalance

Buff alliance racials by 50%. Nerf horde Racials 50%. Mandatory race change for all elves in horde to orc Tauren troll or undead. Blood elf race changes to high elf and rejoins alliance. Nightborne neutral race when factions are at 50% reverse racial changes. to wod levels. let the tryhards switch to horde again and play ugly races and furries