I like how the opening for the mouth is much wider. I've always felt that that's a far better look for the mask, and have hated how all the post-Burton/Shoemaker films have small openings. It just fucking looks better this way.
I kinda like the collar. They've obviously taken the Dark Knight route to allow for more articulate head movement, and the collar is probably meant to make that a bit less awkward.
He looks a lot more youthful than previous Batmen, which is kind of weird to me. I know Pattinson is 33, which isn't THAT much younger than previous actors who played the role, but you can really get a sense that this Batman is a lot younger than the ones in prior films just from looking at him.
Also, I think this is the first time that the cowl isn't design to cover the bottom of his holes with nostril holes. Don't really have any real opinion on that one way or another, just thought it's, like, something.