What isn't covered in "moneyball", and what the statfreaks often ignore--is team chemistry--having a combination of complementary role players. I don't think you just put together a team of high OBP guys.
They have to fit your needs, too. Aside from the issue of other skills--defense, speed, etc.
For example, the Sox happened on it with the "Dirt Dogs", then lost some of it losing Damon--because they undervalued his "intangibles."
Epstein happened on good karma with Bay, VMart and Beltre. And then got rid of it. Would Bay still be a good player in Boston? Hard to say. But I think they had better chemistry with VMart and Beltre.
In 2010, they were right in the race until Pedroia and Youks got hurt. And that was with Ortiz and Beckett having off years. Would they have been better this year with VMart and Beltre instead of AdGon and CC?
I think so. Kalish would have been up and might not have gotten injured, and they would still have that trio of prospects they gave up for AdGon. They would have been better defensively, and maybe the clubhouse might have been different. And Salty would have had more help with the catching load.
Ortiz had an unexpectedly good year, but I don't think they would have missed him if they did not pick up his option, and kept VMart and Beltre. They might even have been able to lower ticket prices--heaven forbid.