There's huge potential here, especially if there's some sort of even imperfect high-level 'glomming'. How often have you written a clever turn of phrase, an insightful paragraph, or a poignant witticism, gone back and removed it to fix flow, and then re-wrote it, not getting the phrasing quite right?

The ability to fix those types of changes, or to revert back to a paragraph "somewhere in the middle" would be huge.