I wouldn't be writing the Pats off just yet. People did that with Pittsburgh after the '77 season (their second straight w/o a Super Bowl appearance after their earlier back to back wins) and they responded with another set of back to back wins.
Ditto San Francisco, who many wrote off after the Giants thumped them in the '86 playoffs. They retooled and had a four year run as the best team in football (winning back to back Super Bowls in the middle of that run.)
The Pats had the Mojo to stop Manningcorps. No one else does.