Wondering if there could be a long button press and twist of the encoder to switch between knobsets.
Like this?
Knob Set Shortcut
A fast way to change Knobs Sets is to hold down the Back button and turn the encoder.
A pop-up will tell you the name of the Knob Set that was just made active.
Oh lol, that exactly 
even pressing down on the encoder then turn to swap fast, just something quicker to switch then the use button