Football is an imperfect sport.
All members of NFL teams' front offices are continuous in the process of evaluating something, whether it's their own personnel, opposing teams or college football players. The best are the ones that can quickly identify their weaknesses and turn them into a strength by season's end.
Finally, league officials recognized that the replacement referees were the league's weakest unit and quickly came to a contract resolution with the regular NFL officials.
Here is each NFL team's weakest positional unit thus far.