That's all fine and dandy, but let's leave them as ancillary lore characters in the background where they belong. We simply don't need more playable elf variations in the game. I for one would be pissed as hell if Blizzard blew their "New playable race" load for the Alliance on High elves. It's just too damn similar to what's in game already & they just don't have a unique niche to slot into.
I'd much rather have as a playable drakonids as an Alliance race, or saurok, or even a group of naga looking to be redeemed and take vengence on Azshara/N'Zoth. Consequently, all would be very much unique as there aren't any playable reptilian races in the game and all would lend a bit of badassedness to the Alliance, which it sorely needs, even after the Worgen.