Please consider adding an option that automatically mutes any input not being used on the surface.
We have been burned by this a couple of times. We switched scenes from our regular band to the middle school band. The regular band’s bass player pulled his cord when he was done playing. This is fine if the channel is muted, but when it was not (as was the case for the middle school band scene), there was a horrible hiss in one of the monitors.
Generally we base the middle school band scene off the regular band, but toss out the inputs we don’t need/share.
One solution is to have all the inputs on fader and make sure they are muted before saving a scene.