Hi arcadesonfire . . . you're preachin' to the choir here ! . . . your suggestion of a hybrid staff/PRV is a great idea.
I also spend a majority of my editing time in staff view, but I have found as you have, that many things are better accomplished in PRV view. So, I'm constantly going between the two views to do my editing. For now, these are the tools we're given, and I haven't heard any rumblings around the forum about staff view updates for quite a while.
All I can offer is my shortcuts (which you may or may not already know about) to make switching back and forth between the staff and PRV views, and midi editing more efficient:
1) use staff and PRV in the Multidock
2) to switch between views quickly . . . keyboard command . . . hold down Shift + Ctrl, and use left/right arrow keys to toggle between the views of the Multidock
3) to use multiple staff view tabs in the Multidock . . . right click on tab, select "lock contents" . . . then you can create other staff view tabs without disturbing the other ones.
4) select a note (or notes) in staff view . . . a lot of the edits can be done using "Event Inspector" in the Control Bar
5) keyboard shortcuts (square brackets) "[" and "]" to quickly transpose note(s) up and down an octave at a time