This.
The attention that people give to the request, both pro and against, is proof enough that it’s not something that can be ignored.
I mean, the " You should’ve added High Elves instead of Void Elves " thread, made by someone who is NOT part of the usual high elf supporters, has gotten 63 likes and 267 replies in two days.
Meanwhile, the “Why should Sethrak be an Allied/Playable Race? 8.3 and beyond” thread has gotten 24 likes and 212 replies in 19 days.
This is not to say Sethrak are a bad idea, only to show how much support each race gather here in the General Discussion forum.
I don’t think high elves are coming. In the end sethrak are more likely to be added, thought I think neither will and we are done with allied races for a good while.
Still, it boils down to the fact that Alliance allied races are generally lackluster and Blizzard didn’t listen to customers at all.
If at least there had been more care and attention to the void elf introduction, a true compromise, maybe the discussion could have died out two years ago. But Blizzard just kept going without ever paying attention to what people actually wanted.