Combs was still on staff but coached from the booth. Barnes coached from the sideline.
Although Matt Barnes is now Ohio State's lead defensive play caller, he says all of the Buckeyes’ defensive coaches have input on the game plan and in-game decisions.
www.elevenwarriors.com
This article from October says Barnes has improved the defense. Please, find where he said he was not comfortable running that style.
The Ohio State football team struggled on the defensive side of the ball earlier this season. Now that Matt Barnes has taken over, things have changed.
scarletandgame.com
It was simply a coaching problem, it is also a personal issue.