If we can't block this year, it's time to get a new OL coach. The fact is that if Hiller can't get five good blockers to play effectively together this season, he should be replaced. The running game and pass blocking ineptitude the last two years do not speak too well for Hiller. The stats indicate he is either someone who can't effectively recruit good OL talent or develop the talent he does recruit or both.
Penix hid a lot of the pass blocking issues because he has such a quick release and such good pressure awareness. But the pass blocking was atrocious, particularly against OSU and PSU. The only way for IU to even out the talent differential against the traditional powerhouse teams is with outstanding QB play. That can't happen if the QB is running for his life or has to get the ball out in less than 2.5 seconds. Justin Fields looked great last year, but he looked great, particularly on deep pass patterns and long throws, because he had time to wait for a play to develop. Penix never had that luxury, he had to get the ball out quickly. Fields also had a great running game so teams couldn't just defend the pass. Penix didn't have that threat either. For Penix to be his most effective and for IU to be able to knock off the powerhouses, he needs protection and the threat of a running game.
The run game was never really effective until IU built up a lead and then, magically, the run game took over. But even that was in only a few games. A lot of Stevie Scott yards came without any blocking or any holes. D McC can be the greatest RB coach in history and he can recruit the greatest RB talent in the nation, but if the line doesn't get much, much better it won't matter.