Hey Dennis - I thought I’d get the conversation started here, in hopes of encouraging others to jump in. 
Not sure if this is outside the scope of what you are after here, but I was just talking to a client this week who was trying to setup better visibility on how many times the client had reviewed a Version. This is probably something more easily achieved with Query Fields or Conditional Formatting, but maybe there is a useful filter here as well. Something along the lines of showing any Version that had been included in a Playlist of a certain Type, or Versions that had Client Notes associated with them:
It might also be useful just to be able to browse the Versions that had been included in a Playlist:
Do these resonate with anyone? Any other ideas for what could be helpful here?