I really love the MC8! (I use it with a eurorack modular synthesizer)
I have a suggestion that could make the expression pedals even more powerful:
-What if the expression value could be processed in two stages, you could call it ”input mapping” and ”output mapping”.
For example, ”input 0-64” (heel down-center) could be mapped to ”output” CC1 0-127 (or whatever cc message and range) and so on. Above input range it would send the output maximum, and below the output minimum.
This would make possible complex crossfading of messages over the range of each expression pedal.
All the best