I agree with that -- his scrambling is a big asset, and he's not so hot from the pocket. But also, the Panthers were continually in his face, and no QB does well in that case.
Granted, but McNabb or ANY quarterback MUST check off, adapt to, and neutralize a defense whose game-plan is obviously to blitz often. And even when the Eagles did manage to pick it up, he shuffles his feet way too much in the pocket and doesn't get rid of the ball quickly enough. Some QBs have a great sense about what to do, and how to exploit it. The great ones do. This is a glaring weakness of McNabb's.