Under Bronco we are so used to seeing a blitz nearly every down. But the key to a 4-3 is you get the pass rush with your 4 down lineman and don't rely so much on a blitz.
Clearly we don't have the personnel to run this yet and we should probably blitz more. I think we are missing the genius that is Bronco Mendenhall and his exotic blitz/coverage packages.
Coach Tuiaki will come around though. I think he has overachieved thus far and is doing a pretty good job with adjustments in game and week to week.