I heard a guy saying that one of the reasons the NFL is tilting towards defense is that there are so many people copying Fangio, who doesn't even have a job right now. He said there are like 9 defenses just using his system* and thriving.
He also said the reason Wilson is having so much trouble is that defenses know he wants to roll right, throw sidelines, and deep, and that's pretty much all they gotta take away to make him struggle. He's trying to become a Drew Brees type QB to extend his career, and has never been that before, and it's gonna take a lot of reps and may never happen for him.
*2 high safety shell and don't show the QB anything pre-snap