Blizz might still change the facial expressions. They did that with the gnome rework (which gave us the all depressed or angry looking female gnome cast), some time after the models were on the PTR.
I don't care either way, I think the new ones are far better than the old ones, though not perfect.
I'd like a glowing eyes option and a normal looking neck. But if they leave them as they are, it's still better than what they did with the Nightelves. ^^