You can tell that Summit spent a considerable amount of money on effects this time around. Not that New Moon's effects were bad, but the wolves feel a lot more wolf like... but that also sports an interesting issue. In some ways, I felt that the wolves behaved a bit TOO wolf like. I know it sounds odd, but remember the wolves aren't just wolves they are humans, who can become wolves. The wolf form is in essence a suite of armor. It would have been nice to feel the humanity of the wolves of which would cater to the tragedy of their existence. They are humans who have to become wolves. In many ways, once Jacob, Sam, Seth, and the rest of crew become wolves, they lose almost all aspects of their humanity. Stephenie Meyer, much like the writers of the 12th century werewolf lies of France, continuously reminded you through out her book that even though she was describing a large dangerous wolf, it's soul was still quite human. A few good examples are her first description of the Jacob wolf, where Bella's looks into it's eyes and is reminded of Jacob Black. In Eclipse, the Jacob wolf barks a laugh, lolls his tongue, and does little things to make Bella feel comfortable around him. Embry and Quil are always teasing each other, as best friends would. In the movie, this is completely ignored. You see them playful as humans, but overtly serious as wolves. In the wild, wolves are very playful. They have their serious moments, but they also have playful ones. In short you need to see the wolves reflect their human counterparts, as in Eclipse the human character simply disappears when the wolf appears. Without that connection, it is just a really large pretty wuff.
What is sad is the easiest way to resolve this type of issue, is to have the actors present to rep their wolf. Have them literally pretend to be their wolf. This was heavily used in Chronicles of Narnia, where actors stood in for their animal personas. While yes, the Narnia beasties talked, but still you get more than just mouth movements and expressions, you get a feel of soul and depth, that is lacking otherwise. The same thing was done for Gollum in Lord of the Rings. Andy Serkis continual presence helped bring Gollum to life in ways that couldn't have been achieved w/o him being there. So producers, please listen, let the Wolf Pack be present during all wolf scenes. It will capture much more depth and humanity of the pack.
The technology is there, but all it needs now is the correct application.