Good stuff. I think that's the difference in a "fast blinker". They process very fast. They interviewed Penix last week or 2 on game day and he was going over film. Was running a RPO to the right with a wide out the far left set to do a drag route across the field. Penix said he was watching the safety knowing that he was going to stay :high" and that the CB was responsible for the RB. He snapped, froze the safety with a look to the center. Saw CB start back pedaling then when he went with the RPO saw the CB plant his leg to drive on the RB. Said he knew the receiver in the drag would be wide open running to his "mark". He was. Unsure if that makes sense, but listening to a QB break down their reads and keys is pretty good stuff. We are not there yet, but as you mentioned (limiting routes imho) and getting the QB's to understand the first read they need and then where to go will make a huge difference.