Okay, Max, go ahead.
You could call this the NFL's Season Of The Tea Party, in that Change Is Supposedly Really Really Bad. All change. We should bring the entire sport back to the 1950s, where you could work out your players until they died and no one said a thing except 'So how are you going to spend his salary on yourself?' Plus there should be no protective rules for anyone. Or helmets. Or, when you get right down to it, that 'salary' thing is overrated...
But the real question of change, according to the experts, mostly comes down to team rosters. In a league whose unofficial motto is Next Man Up, we're expected to believe that signing a few free agents and rookies without having several months to integrate them into the team, playbook, and verbal abuse structure is going to completely ruin a team's chances -- so therefore, whoever changed the least should win the most. Which if taken further should work out to 'Sign someone off the waiver wire, go on a three-game losing streak' and really sounds like the head coaches are trying a mass conspiracy to open mini-camps in February. Your average squad can't stay intact two weeks running and a typical team's condition is Stand By, We're Peeking Under The Bandages. All rosters are in continual flux, forever.
Yes, touchdowns are going to be missed because the wide receiver doesn't have the running route memorized yet. They'll also be missed because the quarterback just tasted the inside of his helmet. Players need time to get used to each other -- but the normal default period seems to be under a week. And then it's Next Man Up -- or in this case, Next Season.
The nature of the game is perpetual chaotic shift, and the choices are 'live with it or die from it'.