@thull (and others), I just now came across this article on diverticulitis in the NY Times. Maybe it's all stuff you already know, but I thought you might want to take a look at it, and the comments section:
https://www.nytimes.com/2019/01/04/well/live/can-i-ever-recover-from-diverticulitis.html?action=click&module=Discovery&pgtype=Homepage