Yes this feature is an absolute must. I'm quite surprised it doesn't exist already as the vast majority of midi controllers already allow for the switching of banks/channels.
I second this idea and was just coming here to create a new post! For live performance, it would be super helpful to either have a floating pane, or - even more convenient for live performance where I need to switch modes depending on whether I'm using Equator or a different VST softsynth - the ability to Dashboard to be configured as a controller so that it can receive MIDI Program Change or CCs.
Example: I'm performing and within Ableton Live I have a series of dummy clips that I could fire off - sending CCs to Dashboard in order to pick a new Mode!