i'm all for more races, they need good reasoning though.
high elves should be added as a subrace, a subrace with a starting zone that shows a new high elven leader rise among the remaining high elves that sees their actions as foolish.
nightborne would be nice, but it's just not going to happen. i would like to see them, and i would like them to be more interested in quel'thalas than the night elves. but them staying neutral and having interest in and dealings with both societies works.