She was shown to be dropping the ball at work in one episode, maybe two. No one knows that she is the (roundabout and indirect) reason Cary got beaten up. Since then there's been no indication that her work has slipped, hell, she was barely even on the show for a third of the season.

"So I have resigned myself to thinking that this is just how sad Kalinda is, getting a kick out of playing people against each other, and having little else in her life other than money."