Druids have simply had their talents reshuffled again in this latest build (12604) and so I'm yet to get stuck into Deepholm questing. All in good time.
My Warlock, on the other hand, is having trouble with a cave that has seemingly been painted over with terrain. Simply, the entrance to the cave is there, but there is no cave. Since it's the only quest I have for Hyjal, I cannot continue leveling until the cave is reopened (the cave existed until this build).
So I've got two roadblocks for my main two characters, and so will have to find something else to do. Worgen creation has been disabled for the time being while the new models are implemented. My lvl13 Faceless Worgen Hunter now is some grotesquely textured creature. At least he still has his tophat.
Worgen have again been rebuilt in 12604 from the previous build's design. This new model is looking pretty good and turns the Worgen from the sleek and thoughtful creatures that they were into something of a much less hugable kind.