I have never played OL, for some reason at 5'5", I was never even asked. Also, my medical problems kept me from playing. Anyhoo, It seems to me that an O-line can have great success when first put together but they get better and better as time goes on, in most cases. Also, on running plays they have to be prepared for a LB shooting through the hole and who's going to be the OL responsible for that if something unexpected happens.
Here's an article about the Steeler's line woes that explains your point above.
If a positive has come out of those mistakes — as well as the criticism leveled at the players responsible — it is the group film sessions that have bolstered the linemen's cohesion and confidence.
"I think we're starting to understand each other a lot more," Colon said. "I think we're starting to talk without talking, if you will. I think we're right where we need to be right now."
To quote Marv Levy, by memory, "Smart players get better". I think that's true of every position. JMO
If you read through the whole thread, you'll see after having things explained to him, you'll see he is taking it seriously.