Not going to say who calls the offense and rather it is Garret or the OC's fault. What I will say is, no matter how good this scheme was in the 90's, it takes execution on each and every play and so far we have not been that team since the early 90's to do such..... Blame the NFL Cap, blame the old offensive game plan, blame a QB with little coaching experience(Garret), or blame not having a good enough team under the new CAP era . Regardless of what is to be believed, I still think Norv's scheme is old and outdated. While it is not his personally, it shows it is even older than that but Norv was the last to make it popular.
I do not call for a firing immediately, but some fresh game playing by a newer and younger coach would fix a lot of issues. We made a huge change with Jimmy and younger thinking. Maybe it is time to do the same in the future......