My suggestion is about being able to specify what the stylus pen pressure is assigned to or what does it control.

Currently it's automatically assigned to the pressure. But what if you could specify whether it's assigned to the pressure or loading or wetness or in case of the pencil the tilt angle? Or maybe any of these combinations?

I understand that the intuos pens have tilt sensitivity as well, so I don't know if that, for example, is affecting the tile angle setting of the pencil? (...I only have a graphire pen...).

In the case of the palette knife, for example, instead of the "edge" button, simply the tilt would determine whether the edge is being used and to what amount (based on either the specifiable pressure, or in case of the intuos pens, the tilt angle). This way every tool would have it's own stylus pressure/tilt setting.