OSU1978, thanks for your response. I would certainly agree that season stats do not tell the whole story. It is
virtually impossible to get at the whole story, purely using numbers, on any given issue. At some point, experience and instinct, especially from an experienced and capable coaching staff, using the numbers at hand, will be used to make an ultimate evaluation. But season stats, and stats generally, do serve as a sound starting point, for seeking answers as to what/how to improve.
Season stats serve as a kind a baseline, and then, as you have done, this can be further broken down by looking at individual game stats, and different elements of the passing offense, such as stats pertinent to QB performance, OL performance and WR performance. It is quite true that, against more elite defenses, the 2016 Buckeye offense struggled more, and the reason for this is multi-faceted: coaching effectiveness both pre-game and in-game, player execution, and the opponent's preparation and execution. But the place to start is with numbers, broadening it out to include game, unit and individual stats, with the objective of determining what happened and providing a basis for improvement.
The primary purpose in my original comment was to introduce the element of passing rating into the issue of the effectiveness of the passing game. While the Buckeye offense has generally struggled to produce passing yards, it has, most years of Coach Meyer's tenure, been relatively efficient when it has thrown the ball, but not, as you pointed out, sufficiently consistent. It is clear that the passing offense needs to improve, both in terms of the quantity of passing yards and, as you pointed out, game-to-game consistency.
The changes in the offensive coaching staff this year are, I believe, an excellent start. The player talent is there. It needs to be coached up.