Currently, there is no programming option for the associated soft key when a rotary is used for the LISTEN buss.
I frequently program a soft rotary to control booth monitors as you can PAFL channels/busses as well and that works great. It would be very convenient to just be able to mute the monitors without constantly running the rotary knob up and down.
I’ve been able to get close with creative routing, but it is convoluted and uses up busses.
SQ5 users would be out of luck. It would have been great if the SQ+ added 4 rotaries for the 5, and a couple more on the 6.