I think saying "always have to be on the move" is an overstatement. It's not that bad. At all. We only have 2 positionals, which are not in our main combo, and they always alternate so there's no guessing. Also, there's 2 charges of True North.

I actually find Reaper quite intuitive given that nothing is a random proc. You know exactly when your other skills will be available and when you can use them.