Being able to set a cross-fade (ramp time) between scenes would be very useful. Sometimes you want to ease into new settings rather than jump to them.
This can be done with an expression pedal, but in that scenario, you’re locked into a scene. The freedom to move to any scene smoothly is not possible with just an expression pedal.
This is one of the Kemper’s strengths (morph), and I think it could be implemented on the QC rather cleanly.
Ideally, the enter and exit times could be set per scene.