I love the concepts. Tennessee runs Y shallow on occasion and probably Y Sail and Mesh from time to time. I just prefer to be able to rely on you're running game, get double teams, and be able to attack different gaps using anything from Trap, to Power, to Inside Zone.It also depends on the leverage, inside/outside, etc... but yeah, I watched Tom Brady get pissed all year because at times, he sees it differently than some of his receivers. These aren’t new concepts and they aren’t exclusive to Leach, Mumme, Kingsbury, etc...the NFL has been borrowing this stuff, they just will not call it air raid or run and shoot. The Ravens are a perfect example, except for the linemen’s splits.