So having read this, what I get from this is that the "formulas" stuff, which looks to be what's intended to teach the player what is what, is just intentionally confusing. It tries to teach in a way that connects with the game, but without some idea of how things work already the information can be overloading and hard to discern. I personally would recommend making things more clear for new players.
I did give a quick test of how things move with holding shift while using the mouse, and now it goes slower than the mouse. If you're after precise controls, why not just make it move with the mouse cursor itself at the same speed? That way, you don't need to rely on shift nor even have a setting to change the sensitivity.