The Ohio State football program made mistakes at the end of last season, specifically at the end of the regular season. Ryan Day was not aggressive enough on the offensive side of the ball, and it cost them. That's the main reason why they lost to Michigan again.
They corrected that issue in the College Football Playoff. The Buckeyes were dynamic on offense from the first snap against Tennessee because they were more aggressive. They were no longer playing scared against their opponents, and that allowed them to win.
Day has learned from his mistakes, and he won't let his team do that again. Day made sure that Chip Kelly called a more aggressive brand of plays during the four-game CFP run, and they weren't stopped. Day will make sure that Brian Hartline does the same this year.
The Ohio State football team won't be tentative on offense anymore
With a lot of new starters on the offensive side of the ball, a lot of coaches tend to get conservative in order to protect their players. The Ohio State Buckeyes need to do the opposite. They need to keep their foot on the gas and make the defense play on their heels.
Hartline hasn't called plays before, and he will certainly make some mistakes as he feels out what he needs to do. Day knows that and will allow him to work through that. At some point in the season, he will find the perfect balance that is needed with the group of guys that he has.
The Buckeyes are very confident that they are going to be able to win the national championship again this season with the guys they have. They feel confident in the young players that they have. That confidence stems from the confidence that Day has in himself.