We've seen this before. Team relies on AD to be the pass rush, realizes he can't do it alone so they add Fowler, or Miller, and things pick up.
Floyd is a very good 3 down LB, he'll get some sacks, but he's not a guy to worry an opposing offense. Hollins is the discount version of Floyd. Lewis remains an unknown. Blitzing the ILB's is a nice trick but not something we should be relying on.
Lacking a legitimate edge rusher it's possible to take AD out of the game.
That said, Allen was lights out last night: Accuracy to throw short, arm strength to throw long, and mobile. Getting the ball out in under 3 seconds. Not sure how you pass rush that.