Paladin Quel’dorei Because Great Kyon is an Arathi Quel’dorei and would not have been present during the declaration the Sin’dorei’s Horde alignment, I would assume someone like him would be accessible to the player character Alliance side.
This is very wishful thinking, they are just as likely to return home than they are to return to the alliance. Although given the short-story we just got, I hedge my bets on them returning to Quel’thalas if they don’t remain in the Arathi. Silvermoon seems to be where the light-oriented elves, both Blood and High elven are gathering.
Elves are innately connected to the Sunwell no matter where they are. It was already said that the Sunwell would reach you even if you travelled to another universe or dimension. So even if he’s never been home, or even aware that the Sunwell still existed, he would still gain golden eyes from it if he channeled the light.
If you’re literally asking for the last remaining visual distinctions between the races to be removed, you mind as well just ask for elves to be neutral altogether.