I think they played above their talent last season and now reality is setting in. Teams know how to gameplan for the offense (and Cam in particular). They have frustrated Cam by bottling him up in the pocket and he has been off target even when he has had time to throw. The Panthers have a lot of holes on both lines and it is showing in a bad way.
To think that Dallas is starting a player that used to be a reserve for that underperforming offensive line. That is pretty scary right there.