I think it's nice to have a simple input to influence some not-so-simple mechanics.
There's no hassle to control, you know which domino to drop to affect a certain thing or several things. The domino principle is really appropriate to mention here, because you're not just hitting enemies or defending yourself, you're also affecting the skills you execute.
It's indirect control, and it's pretty good here.
I'd love to see your game with everything you've learned!