There is not a ton of middle ground in the NFL right now, which was safe to expect after emerging from the most unprecedented offseason in modern history. It seems the pandemic has (somewhat) rewarded established coach-quarterback relationships as we expected. Eight of the 10 best records in the league are held by coaches and quarterbacks who worked together last season, with the Tom Brady–Bruce Arians and Matt Nagy–Nick Foles pairings the two exceptions.
That said, now that everyone is in a groove, do we expect the tides to shift at all? There are always one or two good second-half teams and, thanks to the additional playoff spot in each conference this year, it would not be surprising to see a more significant trade deadline push to lift teams from middling to competitive.