You’d have seen them all if you’d been on the original thread, but to go over them again briefly,
Renthar Hawkspear would have been a good choice as racial leader, he survived the fall of Quel’lithien Lodge but for some inexplicable reason then became a yellow mob attackable by both factions in Eastern Plaguelands. He was a Farstrider Ranger-Lord, so basically held the same rank as Lor’themar Theron, and as a Ranger Lord he earned his Rank, as opposed to Vereesa who never actually earned any Rank in the Farstriders but just started calling herself Ranger-General during WotLK. She rather famously -wasn’t- a Farstrider of any Rank when we first see her in Knaak’s story, because she wasn’t even old enough to -be- a Farstrider, as she was a child, which make’s hers and Rhonin’s relationship a rather deeply troubling one.
Starting zones? Well, there is the option of Dalaran, but that becomes troublesome, as unless all High Elf player characters are children under 18 years old, it was a Neutral city. My suggestion would have been the zone that is on the maps but does not yet exist in game (Similar to how Gilneas used to) it is to the South east of Quel’thalas and seems to have been part of it, and it is called the Greenwald. This would also explain why they start there, as it is actually close to both Quel’Lithien and Quel’danil High Elf lodges! (You can actually see the map outline of it on the Eastern Kingdom loading screens, if you think North west of Stratholme you’re looking at the right place)
As for Racials we know how most Quel’dorei survived post Exile, which was by carrying on raining -items- rather than living creatures, so to reflect that give them the same racials as Blood Elves, but -instead- of Arcane Torrent, to reflect how they survived, give them the ability to disenchant items like an Enchanter can, which gives them saleable mats for the AH but -also- have it give them a bonus to their primary stat for a period of time, the better quality the item the greater the bonus and longer the duration, So like +10% for a Green item, the buff lasting 30 minutes, +20% for a Blue item the buff lasting an hour, etc etc. Its neat because it has a trade off, if you get some green tat that is worthless on the AH, you can still get use from it, it you get something snacky however, you have to consider whether to consume it for the bonus, or try to sell it. Lot better than Arcane Torrent anyway…
Appearancewise, Blood Elf Model, same eye options, some different haircuts to represent the culture they have lived in for the last 18 years or so. The Sunwell provides for all Elves, so Blue eyes naturally, but also Golden eyes for Religiously devout High Elves, and also Fel Green for those exposed to Fel Radiation (Blizzard confirmed that some High Elves do indeed have Fel Green eyes due to having gone to Outlands, yes, even Alliance ones) So basically the same eye colour options that Blood Elves have, for exactly the same reasons.
Tattoos/Facepaint? No. They are -not- a High Elf thing, they seem to be a Ranger thing in terms of warpaint, and 90% of them are Blood Elves and a Magister thing in terms of Tattoos, and 90% of them are also Blood Elves, No Alleria does not count, as technically she is neither, and left Azeroth before the two split, so is not culurally iconic to either.
So either roll out warpaint and tattoos for both Blood Elves and High Elves (Which I think would be cool) or don’t give either them. Giving one or the other them makes no sense.
Racial mounts should be Quel’dorei steeds. I’m torn on this as they would equally use Hawkstriders, and the Void Elves use them, and I know Alliance players love to whinge about more Horse mounts, but even so, Quel’dorei steeds are -named- that for a reason, I’d stick with them.
Not that it matters but as Flying mounts I’d either go with Dragonhawks, or Hippogryphs, either fit, thematically.
Faction tabard to be the banner of Quel’thalas, in blue and silver, so directly the same as the Silvermoon one, just not in red and gold.
Enough ideas for you?
and black 
hair colors.