Building on (but different from) Tap and Hold - External Footswitch Buttons, the BB already recognizes press-and-hold events on the outboard switches when at rest. I would LOVE(!!!) to see P&H options added when playing. Biggest on my list is the ability to transition to the previous part with a P&H, because I occasionally hold the fill for just a bit too long.
In fact, I really can’t think of anything other than transition forward and back for the “while playing” function, but that is all I need.
Please make it so!