Ever since the Pats traded Richard Seymour to the Raiders, their defense simply hasn't been the same. Quarterbacks like Peyton Manning have carved it to pieces, and last year in the playoffs the Jets drove through it as if it were wet tissue. Bill Belichick has a reputation for taking malcontent idiots (Randy Moss) and transforming them into back into All-Pros. The addition of Haynesworth is a major coup, and could add a missing element to a Patriots defense that was, at one time, dominant.
The Patriots often shift from a 3-4 to a 4-3 on defense, allowing them to take advantage of Haynesworth's versatility as a DT or DE.
A note to Chris Polian and the Colts front office: These are the moves championship-caliber teams make to stay at a high level. As currently constructed, the 2011 Colts cannot beat this Patriots team. You need to start making moves, or you are going to have to deal with some testy fans in Indianapolis this year.
I mean, seriously. All it took to get this guy was a fifth-rounder in 2013. (shakes head at futility of Colts front office)
The Colts travel to New England to face the Patriots December 4th.