He spent about $87mill on the 5 pitchers in the rotation and about $9mill on the bullpen, and that bullpen money includes some deadweight like Thornburg and Wright.
While he didn't verbalize "This team is built on the rotation!" he did spend money on the rotation and extended Sale and did absolutely nothing about the bullpen. I hate how he ignored the bullpen, but the bullpen has not really been the same level of problem the rotation is.
And "Blown Saves" are sort of a misleading stat. First off, they're not all loses. And while they do represent a lead that went unheld, that doesn't even mean a relief pitcher had a bad outing. Workman had at least one blown save this year when he didn't even give up a hit (against Texas). I bet other Sox relievers did as well. Sometimes blown saves are the fault of the SP or another RP because an inherited runner scored. Heck an error by an infielder and an unearned run can cause a blown save (which is what happened to Workman in Texas).
Think about it. If a reliever comes in with the bases loaded and none out and is trying to protect a one run lead, he can induce a 4-6-3 double play, and be charged with..... a blown save. Sure that instance doesn't happen often, but that's a really weird outcome. The relief pitcher came up with the best possible outcome for that hitter, and statistically he gets nailed with a Blown Save. It's another stat with uses that can be misleading.
A lot of blown saves are not from pitching poorly, just from really tough situations. Except the blown saves from Ryan Brasier. Those were all from pitching poorly...