The key addition in NE was Wes Welker.
Oh, please. Take away Moss from the Patriots this year, and Welker doesn't come close to putting the numbers he put up with Moss. Welker is able to get open underneath all day because of how much attention Moss draws on every single play.
Oh, please take away Welker and who fills that roll. The signing of Welker was a key the an undefeated season. I don't know how you can say a guy with 112 receptions only had them because of Moss. Look at who made the tough clutch catches.
You said, "The key addition in NE was Wes Welker," which implies that he was a more important addition than Randy Moss, which is a ludicrous implication. Most of the good WRs (T. Brown, Branch, etc.) the Patriots have had over the years could have done what Welker did this year, but they have either been traded, released or gotten old. Given the frequency with which the Patriots threw the ball this year, and with Tom Brady as your QB, there are a dozen other possession WRs who could have put up the numbers that Welker did. Welker didn't even finish in the top 10 in receiving yards or touchdown catches, so let's not act like he was some all-world WR. He is no more than the 4th most important player on the Patriots offense AT BEST, behind Brady, Moss, and Matt Light. And you could argue that several other of the offensive lineman are more important, as well as Maroney, given the lack of healthy depth behind him. Take Welker out, and Jabar Gaffney could step in and produce well as the number 2 guy.