I feel the only weakness so far with Wolverine and the X-Men has been the instances of a rushed Chris Bachalo. There are times when his panels are filled with clutter and debris, and the inker, or possibly the colorist, is not differentiating enough between objects to make them recognizable. The stories have been great fun and I like the cast very much.
I am enjoying Uncanny X-Men now, but I felt it took some time for the book to get moving. The storyline with Sinister was not terribly interesting to me outside of the dramatic conversation that happened between teammates at the large table, and the side stories woven into the storyline that took place mostly within Tabula Rasa were much better than the main thread itself. There was also a Phalanx-based stand-alone that was nice, but did not really stir me. All of that said, it has still been one of Marvel's better books, and I am am generally a fan of Kieron Gillen's work.
Uncanny X-Men simply has not struck me as Wolverine and the X-Men has.