Well then I'd just ask for every horde race to be playable on Alliance.
Why can't I get Highmountain Tauren playable on Alliance? Why not a different Troll tribe for Alliance? Why do Horde get Goblins, I interact with plenty of Goblins on Alliance. Why can't I play Alternate Draenor Orcs on Alliance? Why do I not get Lordaeron sympathising Forsaken as Alliance?
I mean would factions cease to exist if we get one more neutral race?
Because it breaks Faction identity. So no you can't get blue eyed Blood Elves.