I dont agree at all with the above poster. I will try to say this as politely as possible but i think you just suck. Combat in AC3 was way to easy. It just requires more alertness and reactive timing in this one.
But anyway the combat is more simplified in this, as it was in AC 3 compared to the older AC games. It works fine and I enjoy it. It could be a little more polished but whatever.
Combat is just one aspect of this great game.