B. Conversation system replaced by superior dialog wheel with black and white "good" and "evil" choices always in the same location so you can just hold down the same direction and not read anything.
C. Exciting Day 1 DLC which includes the ability to have companions and online play!
D. Dungeons made more "familiar" to the player because they all use a slightly reskinned version of the same map!
E. Quest markers added to remove dependence on "thought."
F. Turn based combat removed in favor of new "cinematic" system where you watch your characters do a bunch of fancy moves, and don't even have to bother controlling them if you don't want to.