No it's the running plays that are the problem. He is reading (not reading) the player(s) he is supposed to read before pulling or not pulling the ball from the RB. The scheme works, but there MUST be a threat of the QB running the ball. I'd guess he only runs the ball 10% of the time. The WORST defense can defend the run when he does that.
Trying to find a receiver too long? IMO, it's not as much that as focusing on only one receiver who is covered up. Then we hear Dave say, "everybody was covered."