For on/off values (0 or 127), why use knobs? Anyone else have a strong desire for 0/127 MIDI switches?
Knobs for visual consistency, I guess But, at the moment you still have to drag them to select the "other" state. A click should be sufficient. But +1 for a switch icon and switch operation. Requested many, many moons ago, I think.
Well, how about clickable knobs? With 2 states... visual consistency and desired functionality