The wide 9 with Fletcher Cox and Bennie Logan inside with Curry and Graham off the edge can be lethal. I like the sound of the wide 9 with this personnel. Better fit than the 3-4.
I agree we have better personnel to run the 4-3 now than we did in the past, but I don't want to go back to the wide-9 nonsense.
Here's a good article I found, for the differences between what he runs and what a guy like Pettine runs. I still like Pettine more because he's more creative in his sets, blitzes more, and this group already has some 3-4 experience that he can come in and make this an impact defense right away.