I'm kind of curious how you can call the acquisition of a guy with a career average below the Mendoza line and a .558 career OPS "a decent trade."
There's simply no legitimate thought process that leads to, "Let's trade for Jeff Mathis!"
Easy, he's a very good defensive catcher who'll be good in a bench role, especially on a team with a very young rotation and two young catching prospects who could probably use a mentor. Arencibia started the vast majority (129) of games for Toronto last season, so his role is going to be pretty sparing.
Anyway, all we had to give up was a completely useless reliever, so I'm not terribly worried about it either way.