I jumped a bit during combat in D2:ED, but in DKS it is a PITA getting used to the changes. Not being able to jump to the side makes it much harder to do what I want in combat, especially in confined spaces or anywhere there is clutter on the floor (I've rolled in place a few times, trying to jump away from an impending magical attack). Crossing rivers in the initial section of Broken Valley, I also rolled under water, rather than jump out of it on several occasions, when I wasn't facing very close to the direction I was trying to jump.
Adding a manual block would not make things that much more complicated than it is now (not that the complexity itself has much to do with anything). Once that is in, why not add combo attacks, and extra bonuses if you time your strikes correctly, and special moves, and if you think about it, the attack buttons are under utilized, so why not have different sequences of buttons do different attacks, and...
