A couple of issues...
1) What's with Polamalu and those missed tackles? He seems to be throwing himself at ballcarriers and trying to bowl them over, not using his arms and wrapping them up. And he's always had an issue with overpursuit, but it's been mitigated by good instincts. More and more he's getting fooled by screens and misdirection plays.
2) Where's the pass protection? There isn't a quarterback alive who can look good if the routes don't have time to develop before the defense is in his face. Run blocking is only half the game.
3) Jeez, where's the defense on 3rd down? All props to the Chargers, but you gotta step up and grab one of those. Everyone knows the ball is going into the air on 3rd and 11. Not acceptable.