Yet they were completely dominated by Ohio State in every aspect on the OL. Indiana is not a top 10 team and they are a bit overrated as they have played two teams Michigan in a down year and Ohio State. They just barely beat Michigan and got absolutely rocked and dominated by Ohio State. If you gave Indiana Wisconsin's schedule they may have one or two more wins than Wisconsin has. That doesn't scream a top 10 team to me. The OL also looked very similar to the Badgers in that Ohio State game. I don't see Bostad being all that much better than Blazek.
Bostad is also in his second year at IU compared to Blazek only being in his first. Bostad didn't look all that great last year at IU.