QB or OL was the problem? Not an important question. The entire team needed a revamp, starting with the HC. Let's start with the OL. Yes, there were gems like Flowers and Feliciano who are now in the NFL; Isidora has a chance to make it to the NFL. Beyond them, the OL was weak and coached by a guy, Kehoe, who was probably thinking of retirement. No way the OL could support a ground game (the QB's best friend) and protect the QB. Meanwhile, Kaaya is flat footed. He doesn't have to be Russell Wilson, but he shouldn't be a statue in the pocket. I don't remember him once ducking an oncoming defensive player. And then there is the defense. An aggressive defense that causes turnovers and keeps the score manageable provides flexibility for the offense. There is no question that the defense is better since Diaz became DC.
The incoming OL looks good. Let's not forget the current OL. St. Louis, Odogwu, Gauthier, McDermott will give depth to the impressive 2017 class of OL. Take into account an aggressive defense that keeps the opponent's offense off the field, and then you see an OL that begins to wear down opposing defenses because of time of possession. The run game improves, and then the QB looks like a Heisman candidate.
It is a complete package. Richt is making moves to build that package. Depth, strength and aggressiveness on both sides of the ball. Athleticism. Speed. No more of that obsolete Penn State fat-boy strategy based on the the legend of an old man and his assistant's penchant for male children. I look for improvement in 2017, and then serious contention in 2018.