The one that has had 3 losing seasons in 4 chances? I admit the winning season was phenomenal, but I think it had a lot to do with a stellar defense and a generational TE. I think most styles of offense can work if you get the right pieces, but IMO the ones that utilize a fullback have a smaller margin for error. I don't know how to measure that so pretty clearly subjective - I don't mind it as a change up, but I just don't see it working as well as it used to. Definitely limits the ceiling on a team, although over the past couple years I've started caring more about the floor. The ceiling seems pretty far.