Yeah and how about the Arizona Cardinals smart guy. They had every piece from last year and still stunk it up.
I can go back and find countless examples of teams who had great seasons only to find themselves in the middle of the pack the following year.
Because Arizona's 36 year old QB pooped the bed most of the season.
Usually a team falls off because of 1) drop in QB play, 2) they got purged of talent in the offseason, 3) injuries
The teams that are decently well ran, and cover most of those first 2 for the most part are usually predictable. Even excluding the Pats because of that walk over division, you have the Seahawks, Packers, Steelers, Ravens, who are usually in and a threat. There's always at least one of them playing in their Conference championship and most are usually a threat.
Yeah, parity in the NFL is crazy, but not many teams have the talent on offense and OL like we do that are going to be good for a long time. The biggest thing to worry about is Dak suddenly playing like Osweiler or major injuries.