In reality his backfoot stuff is cumulative. He's played a lot of football and has developed tendencies in how he reacts to pressure. It's all on his tape from his entire career. In a perfect world he'd be able to have a short memory and go back to fundamentals. In reality, he reacts poorly to pressure up the middle. So when you sign a guy like that the coaches have to build things to highlight his best parts and hide his bad parts. They have not done so.