Just over five years ago I underwent a total colectomy for torrential diverticular bleeding. Although this is not exactly the same complaint as yours, there are some similarities.
In response to another Medhelp patient's posting, I described my experience on Medhelp under the following posting:-
http://www.medhelp.org/posts/show/523166
You may like to have a look at this, print it off and show it to your surgeon(s) and ask them whether my observations are typical of what you might expect. You could also ask whether the surgery can be performed laparoscopically rather than "surgeon's hands inside the abdomen".
If your surgeons confirm that they would expect your experience to more or less follow mine then you will have to decide whether you are prepared to undergo the surgery or whether you prefer to pursue other treatments which may cause risks to endure....
I would suggest asking your surgeons "if I do not undergo surgery is there a risk that further perforations may occur and does this carry the risk of peritonitis - and exactly what are the risks of peritonitis?"
regards
Morecambe