Should have been doing that since day 1.
Not in year 3.
I think Petrino wants his QB to be able to make good decisions in the flow of the game. It's not just calling and executing a play.
Ultimately, it may be an issue of whether Lamar is capable of that. It has little to do with his freakish athletic ability and more to do with what's between his ears. He may be a mere mortal in that regard...