I would have to say I agree with much of his assessment. While I don't concur that Rosenberg & Carr are unable to defend themselves (they chose not to) I do agree that the single biggest failing Rich had here was his inability to field even a mediocre defense. If this year has demonstrated anything it's that coaching DOES make a pretty big difference in performance.
If Rich could've fielded a defense he'd have achieved at least a few more wins (presumably) and would still be here (again - presumably). How Bacon could've largely ommitted the "why" for this problem beyond Casteel is a mystery to me as well.
As much as I am embarrassed by the treatment RR recieved from people here I used to respect the plain and simple truth is it just wouldn't have mattered had he won. And with a defense I'm reasonably sure he would've in far greater numbers than we witnessed over the past three years. Duffy is correct IMO in pointing out that the book is flawed for not spending more time and attention on explaining why this occurred.