Originally Posted by AMERICAS_FAN
It's not just the number of schemes but the philosophical approach.
You're right that rushing only 3 happened too often and that that's a problem.
DL Coach, Leon Lett, recently said that Ryan's 3-4 was a read-and-react philosophy up front. So basically it's not just rushing 3, they're not even rushing.
In Kiffin's 4-3, Lett said we're going back to the days of attacking the QB first, with the DL and adjusting later - on the run to the QB - much like how defense was played in Dallas when Lett played.
So it's not just about number of schemes. The 3-4 is simply a better defense.
Essentially in Kiffin's 4-3 we're going to be running Wade's defense with slightly different personnel. All the scheme changes will be in the back end. If Kiffin is honest about how we're going to play like Seattle you'll see five man fronts alot with the SOLB being a pass rusher alot of the time, gap shooting D.
So we went from Parcells read and react two gap, to Wade's one gap five rushers D, back to a read and react front with even less blitzing, back to a one-gap rushing system with five rushers. Schizophrenia, thy name is Dallas's defensive front scheme.