Somehow I don't see BB shifting his entire defensive philosophy to chase the old Raven's "Lardbelly 4-3."
Interestingly, I COULD see Wilfork making the same transition Seymour made, from hard-nosed young NT to devastating strength/speed combo DE that is a threat to collapse the pocket or suck up an OT/TE combo and still get to the play. He's a bit squat, though. I know BB loves his batted down balls.
I'll say this, though - if BB dreamed up a true 2 gap 4-3 on the back of a napkin this offseason, he has the ideal cast of characters to launch it. I don't know about you, but I think Thomas, Mayo, and JThomas/Redd/Crable/Woods/Guyton can pretty much run free to the ball behind the combined 1300 incredibly skilled pounds of Warren, Wilfork, Seymour, and Brace. I'm also thinking that you could take wider splits with that crew and pretty much prevent TEs from releasing inside - ever.
More likely, though, it's just Wilfork insurance, whether injury or contract.