If you could tie in certain motions with abilities, I will be floored.

Example: Weaponskills... upslash, downslash, side slash... 'jump' (sort of like in sports champions, where you want to jump in the air and stab someone).

Of course, because the game would have to wait (and interpret) what you're going to do, and THEN do the weapon skill, there would be inherent lag in it that would be 'unacceptable' in endgame content... and what if it interprets the WRONG thing? (It happens sometimes.)

BUT IT'S A COOL IDEA worth thinking about.