The problem is that it was below average.
I think focusing any discussion on only one aspect of the offense at any time is the problem. I think it's why there are so many threads that get bogged down fixating on one issue, when in reality there were multiple issues all influencing the offense and each having it's own negative knock on affect to the next item on the list. They all worked together to make each one aspect worse than it might have been by itself. Just off the top of my head and in no order of priority:
-There was a new offensive scheme
-The offensive scheme sucked.
-They apparently (often) called plays they did not practice.
-My memory says that early in the season we called a lot of pass plays that took a long time to develop.
-Freddie was trying to coach like we were the greatest show on turf (think of the Seattle game).
-Freddie was a horrible game manager.
-Baker was inaccurate compared to his rookie and college years.
-Baker started lost his pocket awareness and took off scrambling too often.
-The O Line was inconsistent at best
-The O Line had multiple new players and I doubt the same 5 started more than a 5 or 6 games together as the same group
-More than one team mentioned knowing what play was coming
-Our 'star' WR wasn't lining up where he was supposed to be
-Our star WR was injured
-Our star WR and other receivers (with the exception of JL) dropped catchable balls
-Our man-child athletic freak of a TE broke his wrist (game 2? Game 3?)
Put that all together and it's a crap fest.... and that's what we saw. Each unit & issue negatively impacted the play of the other units/issues. A perfect storm.
The awesome part of all that is we still had two 1000 yard receivers, we had a RB that should have won the rushing title, we have a QB going into his 3rd year who has traditionally played his best when the underdog.