More cinematic detail to combat. I liked a lot of the previewed materials, but the one that really, really caught my eye was a player-leaked archer/ranger power that let you shoot three arrows at three targets, or three arrows at one target. If you chose the latter, the arrows pushed the lone target back your wisdom modifier in squares. The mental image there is just classic- three arrows thudding into the monster's flesh, the first off balancing it, the second knocking it backwards, the third sending it tumbling over.
Overall, it looks like each class has a schtick, and can actually perform that schtick in a cool and competent manner. The TWF ranger is a whirlwind of destruction. The archer ranger is lightning swift death. The rogue moves effortlessly through enemy lines, cutting foes down from behind. I'm loving it.