Well, McCutchen's approach totally changed with the Brewers, and he became a below average hitter for the first time in his career as a result. He left the Brewers and is once again an above average hitter driven by a patient approach.
So, yes, I ascribe some blame to our coaching staff for letting that happen under their watch. We get the non-Brewers version of McCutchen, and we potentially make the playoffs given how close we were. He's not the first hitter they've messed up (see. Hiura, Keston) Our hitting system and coaching is a real problem.