If the team takes that mindset, then next season will see them outside the playoffs as well. They need a new OC, they need to completely re-build the offensive line, they need a new punter, a run stuffer on D, and some more talent in the secondary (safety positions mostly) as well. The defense, to be perfectly frank, needs to stop reading their own press clippings as well. They've been inconsistent all season, had issues with missed tackles, and the team as a whole has been a "poorly timed penalty" wholesaler.
I do think they need to bring in a new QB, as what's wrong with Wilson can't be fixed in an offseason in my opinion. But he's not at all the only reason this team is going to miss the playoffs. Remember, he was only in the game for four of the losses, and he had the team in a position to win last week before the defense pissed it away.
This roster is better than any Jets roster of the past 20 years. But that's not exactly a high bar, and we need to be careful not to confuse "great for the Jets" with "great in the NFL." They still have quite a bit of work to do.