Well, if your players are limited, inexperienced, and have only been in a system for a few months, its quite a bit easier to use the week leading up to the game to take the limited number of things the players do well and develop a game plan to maximize those. Our coaches seem to do that pretty well with the notable exception at Arkansas in which they were unprepared for Card's meltdown. Even when the team isn't consistently moving the ball, there are still a lot of plays out there to be made that aren't being made.
Then the other team makes adjustments at half to stop what we are doing well. Ideally, you also make adjustments and your players are able to execute the adjusted game plan to counter the other team. Our players can barely do one thing well after being drilled on it in practice all week. They have no chance to make adjustments on the fly and be effective. Everyone wants a magic bullet, but there isn't one. We need better players in a consistent environment where they can learn all of the intricacies of the offense/defense and be able to effectively execute all of it. That allows the coaches flexibility to make on the fly adjustments and have those actually be effective.