Seymour's possible at small money, but I think at the bottom of all of this is that Bellichick looked at Brady in the preseason and realized that he was going to have an off year coming off the knee injury. Once he realized that, he knew he needed to gear up for 2010-2011. I think that's why Seymour and Vrabel are gone. He knew they might help this year, but didn't think they could hold up two more years. Thus, he retooled with younger players who would be ready for next season when Brady is healthy.
I don't think it's over for the Pats. For all their flaws, their secondary has more talent than it's had for a number of years. With another year, it should start to pay dividends. Add some draft picks and free agents, as well as a healthy Brady, and I think they're the best in the AFC East again and ready to challenge for a Super Bowl.
Interesting take, but I would hope that Belichick didn't punt the season based upon Brady's health. First, even with an inferior QB in Cassel last season, the team was pretty good. Second, Brady didn't have his best season, but it still was well above average. Lastly, I don't think there was any reason to anticipate that Brady would have an off year. Last year, Manning came back from knee surgery (although not as serious of an injury) and struggled for a few weeks, before playing like a Pro Bowler. I don't think it was possible in the pre-season to know that Brady wasn't going to have what it took.
I think the Pats are in trouble going forward. Moss is looking less and less dominant, and both the defense and the offensive line need major upgrades. I think they're too far behind their competition to realistically become a dominant team again (although I'll readily admit that that may be wishful thinking on my part.)