Originally Posted by
dokhidamo
This is the single reason why I'm not championing High Elves (I would play them to death).
The best way to add HElves is for BElves to go "neutral". That way the two races can share the same model, just with different eye colors.
However, this leaves the Horde with 7 possible races (Orc, Troll, Tauren, Undead, BElf, Goblin, Houjin Pandaren) and the Alliance with 8 possible races (Human, Dwarf, Gnome, NElf, Draenei, Worgen, Tushui Pandaren, HElf).
Looking at that, the easiest solution would be "just give Horde another race, like Ogres." However, having observed the community here since Cata beta, and the WoW community in-game since AQ, that's an impossible option. If Alliance got a reskin of BElves, and Horde got a brand spanking new race, there would be outcry larger than when we heard of Theramore being destroyed. This wouldn't be something Blizz can write off as "storytelling" and "you'll get revenge later." This would be clear evidence of bias when adding a new race.
The other, more palatable option is for the Alliance to field a race of their own to go neutral. This way both sides would gain a race, and "lose" a race. The problem, no Alliance race really holds any inkling of rebellion.
Human - Obviously all despise Orcs and Forsaken.
Dwarf - Bronzebeards and Wildhammers are firmly allied with the Alliance, and the Dark Irons have had bad dealings with the Old Horde.
Gnome - Have a deep and old rivalry with the Goblins.
NElf - Orcs are currently destroying their homeland, BElves have bad blood with them, Maiev's faction despise all non-NElves.
Draenei - Still haven't fully forgiven Orcs for Draenor, Suspicious of the Undead and Blood Elves.
Worgen - "Deploy the Plague," enough said.
Until Blizz starts dropping hints at an Alliance race (or faction within a race) willing to break ranks and join the Horde, it seems High Elves are doomed to be NPCs forever.
P.S. I think Draenei or Dark Iron Dwarves would be the most plausible candidates in the near future. The former going neutral rather than betraying, the latter would bloodilly betray.