Overall it was an ok episode. If they keep using the 3D models I am going to get annoyed, those things looked like crap with the normal animation style, in my opinion.
EDIT: I was reading on reddit that the reason for the 3D was it would be nearly impossible to do the animation of the timber wolves (the falling apart stuff) with Flash, or at least it would have taken FOREVER, so I guess it is forgivable.