I agree it's looking kinda meh, but all of those abilities certainly are reasonable Force powers. You don't slow time, you move incredibly fast (didn't have the sound on, but looked like he might have just been restricting the movement of that spinning platform). And if you can levitate a starship, you can definitely levitate yourself.
As for dismemberment, such violence is a huge factor for the game's rating, no way they'll have it if they're going for a T. The older Jedi Knight games didn't have it either unless you activated a cheat code, and in a post-Hot Coffee world, that won't happen. At best you might see a separate DLC purchase for it, like how they do with blood effects in Total War.