COLUMBUS — Ohio State is now into its Big Ten slate, starting league play with a road win over Michigan State on Saturday night. The Buckeyes dominated the game throughout — but still have a lot to fix if they’re going to reach their championship season. Next on the calendar: the Iowa Hawkeyes. Yes, Ohio State will welcome Iowa (3-1, 1-0 Big Ten) to the Horseshoe for a 3:30 p.m. kickoff with improvement on its mind. The Buckeyes opened Sunday morning as a 21.5-point favorite over Iowa, according to the folks at Fanduel Sportsbook. The total for the matchup is the lowest total for Ohio State so…