I understand he wanted outfield defense, but unless he wanted to have Winn start two of the games this series (which I'm sure he didn't), his start should have come today. First off, it would have been a day game after a night game, where Swisher might need the rest more. Second, and most importantly, if he has a choice between subtracting offense when his ace is on the mound, or subtracting offense when his number five starter is on the mound, the choice seems pretty obvious to me.
As for the bullpen, I completely understand, he uses April to figure out roles. I have absolutely no issue with that. But my complaint about his bullpen usage goes beyond the argument that he is trying to establish roles. In late game situations, where the outcome is not in doubt, he should take the time to try to get guys work who need it. The alternative would be not to give the guy work when the game isn't in doubt, and then, in a big spot, pitch him when he has barely been used. He did the latter, and, as expected, it cost the Yankees.