You know as well as I do that it's impossible to quantify the value of a manager. What does Bruce Bochy bring? Well, 4 rings. A bunch of crappy seasons too.
The real question here is why does Cora still have his job? Why have Henry, Kennedy et al decided to retain him, why did they sign him to an extension, why the reports that he's probably going to end up in the front office?
"He must have compromising pictures of Henry" is of course the fallback joke. When this was used a while ago, another poster, I think it was Randy Red Sox, came back with a great line:
"Any picture of Henry is compromising".