I actually started a new account to only play as the Panthers. I'm successful on offense because my opponent has to respect Cam Newton's ability to run, along with Deangelo Williams'/Jonathan Stewart's ability to run and the pass game.
So far I'm 19-2 and the games I've lost have been my own fault of playing bad D and getting one dimensional on offense.
If you like mobile QB's try Carolina's Shotgun Split Offset with the Dual HB package. It's phenomenal.
It's even difficult to user cover if you call it right.