Similar to when you hit [Shift]+[Full] or [Shift]+[Out], I would enjoy a shortcut that “flashes” all of my manual data back to its background state and then returns it to the previous manual value on release.
My intended use is, say you’re editing a cue and you want to see how your manual data looks compared to the original state of the cue. I would “flash manual” and look back and forth at my manual data and the cue data in quick succession.