The offensive scheme is a check, last year's offense was one of the best in recent history and was being held back by awful defense. Meyer had Florida as one of the best offensive teams in the nation, and easily the best offense on average over the years he had Tebow there. He was ripping defenses apart in the conference where the best defensive talent is, all his teams have been reliant on the run and so have many others(10'Auburn, 07'WVU, 10'Oregon, 13'Auburn, etc.) that have succeeded at elite levels. You watched his run at Florida did you not? He has two national championships and has gone 24-2 at OSU, with even an average defense probably getting them in the championship game. I realize everyone has high expectations but elite coaches still aren't perfect, look at what happened to Saban and Bama against Oklahoma.
I'm not saying this team is a lock by any means, because it isn't and it has flaws. However, Meyer's scheme isn't the problem. The problem is how the defense performs and whether the offense can improve without Hyde's monstrous production coupled with the fact that injuries could always strike. BTW - Hyde averaged 5 more carries per game than Miller and that is including the fact that whenever a QB in college is sack or scrambles(undesigned) it is considered a carry.