John,
Here is my take on this. If PGM continues going forward with modernizing program, as it did this year with UI, the whole multiriff / partial regeneration concept is a solid candidate to tackle for 2027.

I believe the naughty "selection" behaviour you are describing belongs with another very important group begging to be addressed: navigation/transport, which includes playhead marker, timeline, zoom level consistency, looping and a few others.