I don’t think Hairstyles are the problem. I think it’s Hair color. As with the normal skin it would be nice to have normal colors like Allerian Blonde or even Black. Otherwise you would have a High elf with purple/blue hair.
That’s a nice idea. I doubt it will happen for allied races right now, but still nice idea.
Again I doubt it will happen. Each race has always gotten one voice as far as I know.
But I always enjoyed how the High elves in Dalaran have a very soothing and welcoming voice.
Hair styles are not that big of a deal, a option to turn the tentacles of and replace them with normal hair texture could help a lot, the biggest problem is hair colors.
Blizzard already gave a mile by giving Void Elves Blood Elf skin tones, why not give an inch with natural hair colors?