If it were, I can in theory see situations where improving content cleanliness is worth blowing away the KV cache.

But I absolutely can't see how feeding the entire context into a more expensive model multiple times per task, just to propose context edits that might indirectly help, could ever be worthwhile.

Cost wise yes, but in terms of getting the correct best work done? Meh, not helpful!

I think more what's missing here is the comparison of different tries, from the same head. And there prompt caching does help!