This is a really interesting idea you have here, automatic CC or PC commands sound like a nice feature to add and may be possible, that being said it is not currently a very high priority since (as far as we know) not many people would use it and the MIDI expandability of the BB (through units like the MIDI Maestro) is really a big part of our vision for the BB and handling MIDI commands.
Out of curiosity how would this be implemented, a command sent whenever a song part change is made? Or would song part changes all have to be pre-set in order for this to work?
Although our development of the BB doesn’t currently prioritize this, the good news is we have made the BBM open source, and this could possibly be something our committed online community may want to take on.