It's certainly concerning that the team struggled against a pretty weak opponent with a rookie QB. I do like McDermott (for as much ribbing as he gets from fans for looking like Ron Howard) on the sidelines. Team responded with his ass down there, no doubt.
The defensive issues extend beyond DT. Brown/Norwood are doing a horrible job setting the edge on stretch/toss plays, and our LB's (other than Davis) are taking bad angles.
The secondary has been a major disappointment--not just in coverage--but in terms of coming down to make plays in the running game.
Finally: the offensive line is not in sync. Whatsoever. This will need to be addressed in practice. 73 looks horrible out there, and your pair of Pro-Bowlers are not earning their cash. Clausen won't last a full season. Not saying it's his fault. Just looking at the historical facts.
As per Collin: yea, I mean, good for Carolina in landing Balmer--might be able to contribute. And maybe, it's just a matter of finding 2-3 more "role players" rather than Asante Samuel to round it out. But there's not "one guy" out there that will swing the team to 2-3 additional wins.