I wish Dooley explained this better. Us regular normal folks can probably figure out what a 3-4 is or a 4-3or even Cover 2but you throw out Very Multiple and were just gonna stare at him like HH does...all the time. They used that concept when Saban went to the Dolphins, and all it means is theyre gonna use a lot of schemes to attack the defense.
The biggest bugaboo the defense had when Dooley and company showed up was 1. the empty cupboard in the DBs and 2. the lack of quality of DL. The reason the defenses were able to run all over Tennessee last year was because of the lack of quality depth at DT, mainly. Now with some players down in the box and better athletes in the defensive backfield, they can do more of the scheme-switching Dooley talked about when he was first hired in 2010.
Until McCullers came on board, running the 3-4 wouldnt be something they could do a lot (and really effectively). Sentimore gives them a bone-fide pass-rushing 5-tech DE, and Couch can slide out there on the strong side. Not sure who the 4 linebackers will be. But I know theres enough of the type of DT-types in there to really run 3-4 more often.
And just to be clear, this isnt new. Theyve been running some 3-4 looks with 3-man lines since Dooley showed up. Maggit put his hand on the ground a few times last year. And Ive seen Smith and Bohannon playing sorta Jack-like where they switched sides and stood up. They just have better personnel now.