Miller doesn't finish his blocks, he does well initially on a play, controls his assignment and then gets embarrased by a double move. For instance, on the play Teller gets praised by the commentators, he walls his man off and then he drives him to the ground. On a similar play, Miller does this to the DL initially, a hole is created, but it quickly disappears on a DL double move. Miller ends up on the ground.
Miller needs to keep his feet moving in the running game and play with more nastiness.
Good thing about the OL, is that I saw every guy playing some, Groy endeed the game at OG (for Miller) Sirles was on the field that I could see, but he surrender the only sack on Barkley.