Rees did a really good job of building an identity and leaning on his playmakers. He also had a few games where he got into a really nice playcalling groove and put his guys in positions to make big plays with scheme, rather than just letting them be better than the guys across from them (though he did that when appropriate, too).
His next step is to get away from the BK "stubborn in our intent to do something specific" thing. He needs to be a bit more flexible, and figure out how to incorporate more play-action and misdirection stuff. The screen to Tyree early against Bama was good, and something they had used and built towards throughout the season.
But the way they were using crossers all year, as well as their elaborate jet motion packages, should have lent themselves to more shots down the seam, or even a throwback or two, but they didn't really try to get overly creative... and that was a problem, because having a 5th year QB that can bail you out with his legs is the EXACT time to get weird.
My other gripe is over-reliance on running all-curls on 3rd-and-medium. There were a lot of plays late in the year where Book is scrambling around trying to make something work, but he's got three receivers sitting down on curl routes and no outlet. Hopefully their deployment of Kyren in the passing game against Bama is a building block to solve some of those things.
