The only major thing I dislike about NFL is when they have double headers and cut away away from the 1st game refusing to show the final minutes of the game to show the begining of the 2nd game. I would rather watch the ending of the game than the opening minutes of another....you would think the league learned its lesson from the Heidi incident.
Another would be the realignment from 3 divisions (West, Central, East) to the current watered down 4 (West, North, South, East). Now you have teams with 8-8 records making it to the playoffs.