Not sure what you been doing the last 5 years, but I can guarantee you that 100% of the weapon hits in Skyrim will be ACTUAL hits. The only thing that prevents damage is blocking, armor mitigation and moving about. Same as Oblivion, really.
As for dealbreakers:
I don't really have any, I know the game will be at least 8/10 which is enough to make me want to play it. I do however have some ideas about what the game SHOULD optimally be like though, but I'm taking that to separate threads (suggestions and whatnot).