That, and he's moving to the more "offensively challenged" National League. I'd expect him to be better here than he was in Baltimore.
But so is any other pitcher likely to show better stats, but that doesn't make him better.
I don't buy any of the "he'll be better in Nats Park", or "better in the NL" BS.
They still award 1 win and 1 loss for each and every game played, regardless of league or park. Any pitcher would benefit by facing a lineup including a pitcher vs. a DH, but that's true for your opponent as well, so it's all neutral.
On the other hand, if we think the Saint can help Cabrera find religion, I'm open minded as to the possibility.