Ohio State's offensive line was dominant at the end of last year. Everybody who had OSU on their schedule for 2015 had to figure, "we need to figure out how to neutralize their O-Line or they might hang 60 on us." So they studied the tape and changed their tactics.
Sometimes coaches can "fall in love" with a player. Meyer has fallen in love with the entire Boren family. He loves their toughness, effort and work ethic. If Boren is playing hurt, but not using it as an excuse, it makes Meyer love him more. Which is well and good, I guess, as long as you keep winning.
I don't think OSU makes any personnel changes on the O-Line, at this point in the season.
Disclaimer: I'm now about to wade into the deep end of the speculation pool...
If some of the backup O-Line guys are outplaying the starters in practice, but the starters keep their jobs despite struggling on Saturdays, that might explain some of the players' frustration that we saw after the MSU game.