As someone who has played on both keyboard/mouse and controller, I find the latter more forgiving in terms of movement. But if you're playing SMN, you may find fiddling around with cross hotbars annoying. I know some players who use QWES, though I think you simply need to practice more to develop that muscle memory. It took me ages to shift from controller to keyboard because I've been a console gamer my entire life. Do some easy dungeon runs and spend an hour or two hitting a dummy. You'll eventually get a better feel for it.