The Pats problems are in the back half of the defense. Fortunately, their main competitors in the AFC, KC and Denver, aren't great passing teams.
If they run into a healthy Pittsburgh or Oakland in the playoffs, though, might be a different story.
Oakland isn't making the playoffs, though. We're trash without Care, and 2-6 weeks without him is going to put them too far back to climb out.
Edit: Alex Smith is having a really great year, so there is that. Still not their bread and butter. Besides, every time the Chiefs are the last undefeated team they fail to win a playoff game because KC is Marty Schottenheimer in team form.