Donny....One of your issues was addressed with the Live Control Knobs. Use one as an "on deck mic vol". I pair that with the 2nd knob to adjust reverb. And those are just two of the many settings you can assign to the knobs.
Eddie
I'm using one to adjust level between lead voices and style; the other to mute style parts on the fly. At least they replace a couple of the many programmable buttons and sliders on Korg.