It would be cool if the midi notes and GUI keyboard would have a bit more interactivity in the PRV. Maybe color the keys according to the selected midi note color? You could light up chord shapes when using the scrub tool, etc.
I wish I could exchange the effects enable switches with the pre/post switches to see on -off status at a glance- or at least un-hide the enable switches. The default arraignment seems pretty goofy to me.
Great idea on the offset status indicator.
I thought there was a mermer about a more user controlled graphics arraingment a short while ago.