The fact that Wolverine is never able to go full on violence is something I feel harms the character in a sense. I know we can't have gore and the like in a PG-13 movie, but I still feel that it makes Wolverine appear less threatening when he stabs a person only for the to simply fall down, as if they weren't just slashed by three unbreakable claws of steel.
I'm glad to know this continues on from X-Men: The Last Stand as I feel they better explained Wolverine's past (in X2) without fully explaining it, giving you an idea of what lead to the transformation into the man he is today, but still keeping that mystery that surrounded the character for so many years.
Hopefully, this will simply be seen as a continuation of the original X-Men trilogy and not simply a Wolverine movie, giving it the idea that it's part of a bigger world and plays a role in building Fox's X-Universe they're trying to build. And despite the negative points, I still feel that if it's better than the monstrosity of X-Men Origins, I will be happy.
You'll be extra pleased to know that there's apparently gonna be an unrated version when it comes out on Blu Ray.