Well, it's kinda given that the launcher-based weapons will look terrible, since they're really only for play.
Honestly, these are pretty nice from what I can see. Han's the least interesting, but I love the trooper, and Maul intrigues me. It looks like there's some new coverage for the back of his shins. And, as Square pointed out, technic in the upper arms. IMO, the technic looks obtrusive there.
EDIT: Maul's lower arms are also custom, which makes me think the arms contribute to knob function, or have their function to them, perhaps since his weapon is double-handed.