We've pretty much all looked the same for years anyway. I mean when you're playing WoW you don't really see the face of each character that clearly anyway unless you're in first person mode and right up in their face. That's even if they don't have their helmet on which in that case, if they do have it on, having the same face isn't even going to matter. This is why the same face "issue" doesn't bother me because we all already look like a bunch of clones running around. I mean, yeah, it's fun having lots of customizing options but in WoW's case, really, in all MMOs, having a different face really isn't going to matter all that much. Plus givin the fact that we're going to have facial animations now like the Pandarens, I'm not sure if it's even possible to have different unique faces for each race. Maybe that could be another reason why they added the option to use the old models instead of the new ones.
And you know, the thing is we've been wanting new models for a long time and here we're finally getting it and now we're giving Blizzard shit because the faces aren't different. I mean come on people, when is it going to be good enough for you just say "Yeah that's awesome! Thanks Blizzard" instead of "Yeah yeah, we have new models now but they're not good enough, make them better!" I mean geez, let off a little bit. Plus they're not even close to being done yet, the beta isn't even out yet nor has it even been announced when it's going to be out so they could've been working on different faces anyway. So just be patient about this.