I'm against pulling anything more from the blood elves. From now on, blood and void elves should be get different things. You can have colors that feel different yet similar, but wildly different styles. ALso, I think void elf options should aim to fit with the original skins.
Like I posted elsewhere (and more than once):
- Hair colors like: Black, white, silver-blue, dark red, bege, dual color (black/red, blue/blonde)
- New hair styles, with option to toggle between tendrils or braids, so you can select traditional or voidy look.
- Celtic-like markings with cool colors like blue, violet, magenta, or voidy in nature.
Art example of hair with braids in place of tendrils, as well as blue markings: