I’m sorry you’re unhappy about the options Void Elves got (and probably will get once allied races get their customization pass).
I don’t agree with you that any hairstyle that Void Elves currently have is an option that should have gone to Blood Elves. The only hairstyles Void Elves currently have were made for Void Elves.
I do think Blood Elves need more options but that doesn’t have much to do with whatever options Void Elves currently have or get as long as they aren’t copy/pastes from Blood Elves.
Void Elves getting options from other Alliance races has nothing to do with Blood Elves.
I’ll leave you with this though… if you’re expecting Blizzard are going to somehow take options away from Void Elves in the future, or never give them any new options going forward, you’re probably in for a bad time.