No, but having a few new guys in charge of the offense is a big deal, and there are a lot of differences between the 2015/2016 offense and the 2013/2014 offenses. Watching some games and studying the tapes of the games can show that.
It seems to me that the coaches and coordinators matter almost more than anything else in college football. While recruiting top notch players is important, a great coordinator completely changes the dynamic of an offense or defense. In 2013, Ohio State had one of its worst pass defending offenses ever. The secondary was a sieve, and even that is being nice. In 2014, Everett Withers leaves, and they bring in Chris Ash, and the secondary gets good again. When Ash leaves, they bring in Greg Schiano, and the secondary gets even better.
I expect to see a similar resurgence on the offense. Herman was a great offensive coordinator, and his offenses were effective. Tim Beck and Ed Warinner did not have good offenses. This year, they bring in Kevin Wilson, who is universally known as an offensive guru. I expect to see the same type of improvement that we got from the defense from 2013 to 2014.
If it is anything like the Herman offense, it won't matter who is at quarterback in 2017. The Buckeyes will be a national championship caliber team with Barrett, Haskins, or Burrow starting at quarterback. And honestly, the quarterbacks look like they may make that jump. The offensive line is still a question mark, but it has plenty of time to improve.