I expect a repeat of the South Carolina game plan on both offense and defense. On offense, assuming that OSU plays man-to-man defense, start with 5 out and let players beat their man to the basket, either by driving with the basketball or moving without it. On defense, guard high and challenge passes -- force them to make long and difficult passes into the post and expect a lot of turnovers when they either exhaust the shot clock looking for an open passing lane or make an incautious pass that gets picked off.
If OSU plays zone defense (which would be rational given their relative lack of mobility), then play as UConn does against any zone. OSU doesn't seem to be a zone team, so they can't have a sophisticated zone if they use it for the first time in serious competition on Sunday.
If UConn gets to the final against Syracuse, then they will face a sophisticated, Boeheim-influenced zone, and that will be a whole different kettle of fish.