Spent awhile watching Allen film today too. When he does stay in the pocket and set his feet, he's actually very good. Doesn't make terrible decisions, throws over the middle, and really actually does go through his reads. The issue is what you've already said: he can't stay in the pocket. He panics, big time, from pressure up the middle, and will start to run immediately. If you can just get him to stay/step up in the pocket, he could work out