I am just starting to experiment using the KPA for bass tones and have a few observations, but in particular wanted to toss out one specific suggestion....
Guitar and Bass rigs have quite different EQ frequencies. It would be nice if within the EQ section of the KPA there was a "Bass Rig Shift" toggle that would alter the frequencies of the EQ knobs to be more tailored to Bass rigs rather than guitar. I suspect this would be a rather quick and simple feature to implement with minimal risk and yet be quite useful for Bass applications.
Sonic