Look last year is last year. The fact that Davis runs all the time in '15, makes his completion percentage artificially higher and his attempts artifically-lower.
You have to have some trust in your coaches. Back in the 90's I was upset at the choice of Brungard, but he was able win titles for us. I was upset at the choice of Tidwell over Zwick, but he turned out to be a great QB for us, with a title as well. Yet Tressel, did nothing with Tidwell, even the spring before Zwick left, Tressel was not even working with Demond Tidwell. Later, Tressel said he will never make that mistake again. All QB's get the workouts.