I recently switched from MX-S to H3N, haven't had any problems, my game instantly improved.
Just pretend in your head that you're constantly playing against backspin. Obviously, if there is no backspin, you want to have a more forward motion.
The slower rubber speed and the lack of catapult allows you to strike hard, to brush the ball really fast, without the ball going over the table. I feel it's easier to handle than those catapulty beasts, because with those you really need to get the timing/technique perfect to brush the ball with equal speed, but without the ball just shooting off to Madagascar. This gives you easier-to-access great (not greater than MX-S) spin and easier placement (at least that's how it is for me). If your weight transfer and stroke are correct, you won't lack speed (although MX-P or other catapulty rubbers will obviously always be faster).
If you feel it's still too slow, I wouldn't suggest putting it on a lightning fast blade right away, as especially with these kinds of rubbers, you need to learn the proper technique before advancing to EJ-land.
Good luck!