Well, on the flip side, technically the Patriots are set up pretty well to continue to improve over the next few years and remain a top team through the rest of Brady's prime.
That said, I've completely lost confidence in Brady and Belichick. They can win plenty of regular season games and look great, but they've now lost three straight playoff games, and they haven't come up big when it really mattered in a long time.
This Patriots team just doesn't have an edge anymore, and teams that do have an edge - Jets, Steelers, Ravens etc - have had a disproportionate amount of the post-season success lately. If I had to point out one thing the Patriots are really missing, it's that edge. You need to have that hard-hitting, bruising, slug-it-out edge to your team in order to succeed in the playoffs. The Jets have gotten to the AFC Championship game two years in a row despite being an underdog all the way because of that, and the Steelers look poisd to win their second Super Bowl in three years because of their edge.