I don't think the OL we have are so awful they can't be rescued. I see some of the shit they do, or schemes they get into, it's hard.
Plus I heard Raiola speak at the coaching clinic in the spring. He talked about hand placement of the OL....and it was basically the opposite of everything I've ever been taught as a player, or saw/learned from any other coach at a number of clinics I've been to over the last 18 years. He was thumbs in, not thumbs up.
The biggest issue to me upfront, how much movement do they really block on a regular basis? It just doesn't seem like much, maybe I'm wrong, because outside of the one practice I watched, I have no idea. But that one practice in the spring, was very little movement, and a lot of doubling an entrenched DL to a backer.
Heard a Coach Embree speak at a clinic one year in KC, he's been at Mizzou, Arkansas, and several other stops. His pass protection stuff was really good, but he talked at length that if you want to get good at picking up shit, you've got to rep the looks you're going to get on film and the standard defensive blitzes like America's blitz.