Not even that, but who cares that there isn't a consensus within the community? The WoW community is incredibly large, it's always going to be tough to have a consensus. There's people that want Nathanos style Undead Allied Races and people that wish for San'layn, two conflicting styles of Undead. Does that mean Blizzard is going to go, "shoot there's no real consensus on what kind of Undead Allied Race they want, guess we won't do one/will hold off till there is" that's utterly dumb line of thinking.
Blizzard will add the Allied Races they feel that players will enjoy either based on their own personal decisions or from what they garner from player feedback.
This thread and other High Elf threads like it that showcase ideas for High Elves are merely to provide a springboard of ideas for Blizzard to choose from and run with it. It's not supposed to be a "let's try to find a way to include everyone's interpretation of High Elves in"
For instance, using myself as an example, I want Alliance High Elf Paladins to be available, but if they're ever added and don't have the Paladin class available I'll understand the conceits that were made (too much of a Blood Elf thing in WoW etc etc). I already know there is that possibility, but until they come out with info putting a hard "no" on it then people will always continue to ask.
Hell people still ask for Undead Paladins even though Blizzard explained it the same way Void Elves can't be Paladins.
If those who want them still wish to make the requests, they should do so. The only reason people to shut down or stamp out the requests is to make themselves feel better about "yes no more talk of High Elves meaning the want for them has died down."
Doesn't matter if I ever stop playing WoW or not, I'll continue hoping for Alliance High Elves to be added. Heck I always wanted Demon Hunters to be added, and ended up quitting the game around Firelands, Cata, far long before Demon Hunters actually became a thing.
Not to say people quit over Demon Hunters and that's why Blizzard released em, but I have seen a few others say similar things about High Elves, "Blizzard will save them as a last resort when it's needed for WoW, just like DHs"