This is the dunderhead way to look at things.
Analyze football, look at how teams get built, look at how teams get old.
You have a 2 year window to look at the entirety of the picture of something that has never been done before. When Belichick arrived, the team was headed down, more losses each and every year since 1996 (when Belichick ran the defense and departed). (1995 they had 10 losses).
He quickly turns around the team, uses Brady as a game manager in the playoffs (let's face it, all the playoff fames were won by the defense and special teams, the offense didn't do very much at all, heck Bledsoe was QB for the AFCCG).
Fast forward to the end of the SB wins: 3 pts given up to one of the top offenses in the history of the NFL.
If you think this is nothing, you don't know football.