What I want to see in KOTOR3 is a "real" force jump. (kinda like what we saw in EP3.)
If movement were a bit more free (such as force jumps), but still keeping the RPG elements of course so its not a new Jedi Knight game(even though I love those!), it would be way better than the first two.
I think, with new movement options such as jump and croutch, they could probably add more to the game's play time with puzzles involving the new skills and silence the people who say "combat is just one button."