Agree with this idea 100%, but I'd like to go a step further.
Unique "temp" passive powers. Run, jump and flight options. Choice of one from each. Each power just replaces the default animation that goes with that specific element
Run: Default, Beast run, Ninja run (run only), any others added later.
Jump: Default, Ninja run (jump animation), Jet pack, steam jump any others added later.
Flight: Default. Someone mentioned Seer movement, that would be an awesome Hover/Flight option. Also, all the flight poses - allow the default flight/hover animation to be a specific pose without using a macro. Additional animations like meditating on a cloud, etc.
On a linked suggestion - Beast Run & Cloaks. When in Beast Run, cloak physics are disabled. They stick out rigidly.
Also, it would be nice to pick a sound effect with these that overrides the default footstep/landing/hover sounds. I'd love if my robot characters made robot noises when running.