I agree in general that Ball has been average to below average thus far. However, I think too much blame is being placed on him. Wade is letting the cornerbacks play a lot of man without help over top.
Ball is just one guy. Often when you see him coming in late into the picture, it's not because he let his man get over top of him, but rather he's arriving to help on the play.
Wade had the safeties playing up a lot today I'm assuming to help out in the effort of trying to stop Chris Johnson. Fisher called the Cowboys bluff and tested the Cowboys corners. He won.