I'm sick of all the "arrogance" talk. This is what happens when you let too many former players into sports media -- the entire tone of the reporting changes, and you end up with even the real journalists parroting the short-sighted, narrow-minded, and small-picture points of view of the idiot ex-jocks shouting on ESPN.
It's fundamentally ******ed to make the assumption that if a head coach/gm chooses not to bring somebody back, he thinks his team can win without them.
I'm sure when BB decided to trade Branch, he knew it was going to make things much harder for 2006. But BB has to think beyond 2006 when making personnell decisions. BB's position is that if you start paying players more than they're worth to retain them now, you eventually put yourself in a position where you're unable to retain a more valuable player willing to play for less later.
Belichick is not an idiot. He knows that losing a bunch of players this offseason makes it harder for the Pats to win now. But he also knew that the new CBA was throwing the market out of whack, and that the contracts being handed out in 2006 were not good values.
His decisions this year have nothing to do with a notion that his "system" can win with lesser players -- it has everything to do with his unwillingness to hamstring the organization in the near future just to keep a couple guys this year.