I agree that high elves should never be an allied race once we get void elves, but unless there are bits of lore that we don't know yet... making void elves a faction of exiled blood elves instead of an evolution of current alliance high elves is a bit insulting for those who have been asking for high elves for a long time. Yeah, blood elves with blue eyes, that's what many have been asking for years... and it's fine.
The problem with void elves (and nightborne to a lesser extent) is that you can't just lock them to such a tiny small spectrum of skin tones or hair colors when the original model is on the other faction. I have the feeling that they are trying so hard to make them different that they risk to make them extremely niche. What they lack is more options and by giving more options they could also reach a compromise with people that wants high elves.