What if the insert slots on the mixer would 1 to 1 stay in sync order wise with the offline processing inserts list for the channel/events , but would allow being applied keeping the insert chain intact and just take the current plugin settings up until that point ( i realise that it’d have to offline process everything before the toggle up unto that point ) this would create a more fluid way to apply offline processing in the natural workflow, yet still profit from committing and freeing up cpu usage. Maybe in the form of auto applying it to all events on the track and updating the track images too. Or in case of a vst instrument, temporarily render the audio and switch the instrument track to an audio track but when you toggle it back off it switches back to midi.
I don’t get the point about the feature request.
Did you ever read the manual? Or do I get your description completely wrong?