Sometimes it would help to mute a specific layer, or solo (=mute all others).
Most times this would be usefull for programming, whether to show some details by hiding all other stuff, or to program a specific effect etc.
Of Course one could use the opacity, but you would have to select multiple layers, pull the opacity down and make the opacity not an active value. and if you click reset, to undo the programmed effekt you have to start over again.
Maybe this could be done via little "sub-icons" on the device-viewe-tab.