i.e. stopping playback at any bar, firing up the stylemaker, and finding all the relevant patterns, and only the ones that have played at that moment, under my nose, so that I can edit the notes of whatever patterns through the notation.

Not really different than stopping the playback at any bar, firing up notation mode, and the notated bar right in front of my nose.

What I am trying to do is to fine tune some styles so that BB doesn't play weird and unneded notes in the accompaniment, which are too many to mention, even with 'simple arrangement' engaged.