I would think that switching the microphone on and off with the Mic/voicetron switch is not needed as microphones themselves often have switches or if not cables with switches at plug are commonly used. If the software could be modified to switch the voicetron function on and off rather than the Mic it would serve a more useful purpose. I imagine that if it can be assigned to a foot pedal function it can be assigned to an existing physical button interface?? As Don indicated, this needs to be an instant function and does not allow for switching screens or holding down a button tying up a hand.
I too like that the voice from function remains on without a style so it can be used while playing another instrument during performances.