Well, that Elasticity power one gets for supporting the game ticks one item off the list
I would be a fan of seeing customization on different poses/stances for travel powers-- namely, different runs for super speed and flight poses-- that can be toggled with player preference. I never got how /flightpose worked in COH (assumedly worked better as a macro, if only I knew then what I do now) and Champs simply has them as separate TPs altogether (often combined with VFX options baked into the power).
So, say you get super speed, you should be able to freely choose whether or not you want an athletic run, anime run, comical run, etc.
Some of the CO travel powers are really creative, such as tunnelling (including ooze forms), swarming flight, and super-speed rolling: the latter of which is something one of my mains in that game's concept is based on.