In the past, the offensive coaches have been left to do their own thing, so saying Bronco's practice model doesn't work for the offense may not be accurate. More likely, the offense simply hasn't been following the same practice model as the defense.
This season, however, Bronco has planted himself among the offensive coaching staff. I think there could be hope that the offensive practice model could be a little more intense this season as compared to seasons past. We won't know the truth till August 29th, though.