In Ion’s own words:
Blood Elves are pretty much High Elves… Void Elves are also pretty much another flavor of High Elves
I think both Blood Elves and Void Elves have some fair claim to being High Elves or at the very least, having their roots in the Quel’dorei.
As to those who keep trying to limit what a High Elf is by things like blonde hair or access to the Paladin class (and as Blizzard has said, anything is possible), allow me to put forth something.
First let’s establish a fact I think we can all agree upon. However small their number, there are High Elf members of the Alliance. We see and interact with them in game. This is indisputable.
Now, indulge me with a hypothetical. An Alliance High Elf civilian loses a family member in the fourth war to attacks by the Horde or from one of N’zoth’s invasions. Feeling powerless and lost, he turns to Alleria Windrunner and the Ren’dorei to teach him their ways so he can protect those he loves and not be powerless in the face of danger again. He trains under Alleria and Locus Walker using similar techniques that Alleria herself used.
Eventually he completes his training and takes on a void form for the first time. He still retains his usual High Elven appearance when not in void form. His history as an Alliance High Elf has not changed even if the direction his life is taking has. He now fights for the Alliance under the banner of the Ren’dorei. He has crossed over from being an NPC to a Player.
Is he not allowed to consider himself both an Alliance High Elf and a Ren’dorei? Unless something changes, the game mechanics will of course identify him as a Void Elf just as the game identifies Horde High Elves as Blood Elves, but that doesn’t completely erase his history as an Alliance High Elf, nor do I believe it takes away his right to call himself a High Elf.
The fact that High Elf wayfarers are in Telogrus indicates scenarios like the above are possible. I’m hoping that Blizzard also adds some in-game references to such just to clearly show that Alliance High Elves are actually joining the Ren’dorei and learning via Alleria’s learned method rather than being forcibly transformed by an interrupted ritual like Umbric’s squad.
Another interesting implication of the above scenario and Alleria as an existing in-game example, is that these abilities aren’t inherent but rather gained through study, or in the case of Umbric’s squad, forced upon them magically. In any case I find it interesting and I would argue that Void Elves are as much High Elves as Blood Elves are if we are talking about who bears the Quel’dorei legacy.