It has been my contention, for almost two years now, that the best course of action would be for Blizzard to integrate the High Elves into the Void Elves – the specifics of how this is achieved are, largely, inconsequential.
If this were to occur, hypothetically, I decided a long time ago that I’m largely unconcerned with whether or not Blizzard introduces “High Elf Customization Options” for Void Elves. What I consider important is that the Alliance playerbase be able to easily identify the Void Elves as being socially and politically related to the Thalassians (i.e. High Elves) that’ve been fixtures on the Alliance for 15+ years, which isn’t happening currently.