Hi,
I have a Pitchfactor and Modfactor on my effects board that I use for both guitar and bass. One feature I would really like to see in a Factor series/H9 update is the ability to change the "source input" via a MIDI CC rather than needing to do this by digging into the menus. In particular, as I use MIDI Designer on an iPad (using adapters to get to the physical MIDI connection), I could set up one meta-command to give the command for both units.
I would be interested in MIDI CC for other options (turn on/off MIDI clock?, etc.), but changing the input source is by far the thing I would really like to be able to control without doing a menu dive.