Arcia WAS a problem last year, but he is performing better this year offensively. If his defense matched previous seasons, he'd be having a good year as a SS. The question is, what happened with the D? Clearly, he didn't lose the ABILITY to play good defense, so I'm sure the org is trying to get the message home that he needs to play his position better, which is very possible for him to do. It seems counterintuitive to bash Arcia and his.5 WAR this year while defending Ryan Braun and his .6 WAR, when one is in the decline of his career and the other still has potential.