I understand and agree with your "deminishing returns" point.
Though, this is what I plan: I'm probably going to listen to it again (I want to understand the points you make in the book well enough before I pose questions/critique), and when I encounter something I can easily fix, I'll do so, and save/export. It doesn't really require too much extra effort on my part in addition to listening to the whole thing again.
In this case there is a slight return for a slight effort/investment.
If I do so like this, would you upload the improved versions? Or shouldn't I even bother sending them to you?