Let it go, nobody runs a 3-4 anymore not even the Steelers.
This is a passing league, you see more 4-2-5 defenses now or the hybrid 4-3 like the Ravens run where the rushers are stand up edge rushers who can cover the flat or have the flexibility to put their hand in the ground when you run a 4-2-5 scheme.
I hope that he brings the versatility that was lost when we started shipping all of are versatile talent out (CGJ, Baun, Ellis, etc) and never replaced them and we went from a defense with a lot of bite to a toothless defense.