What I'm asking for is another toggle button on the settings-page at the MIDI Controller config called "invert". It should be simple like that: if activated it'd trigger the simple operation "CC = 127 - CC".
What could be done with this? Well, I was thinking about crossfades and morphings that could be done then.. e.g. simply use two mappings to "amp set" on the same CC, one normal on the first track, one inverted on the second track. One twist of a knob on the controller now would crossfade between the two tracks.
