Folks need to remember, Brock is not a rookie coming out of college from a spread offense. He was in Denver, under Kubiak, behind Peyton Manning, in a Real NFL Offense. Now Kubes O was more of a run what I call, dictate to the Defense system. O'Brien's is going (eventually) be more like the Pats- an Alert, Check with me, calling out the Mike, etc... type offense. Brock is still learning new system/language... but he's no rook either. Creative blitz schemes etc... come out in the regular season, rarely in the pre-season.