Just curious as to training age or how many years you have been exposing your body to powerlifting? I think it would be very relevant to your scheduling. I have friends who are worldclass deadlifters from USAPL. They are life time drug free guys and both deadlift 750+ at 220lbs and 198 lbs. They started to reduce exposure to deadlifting every 10-14 days due to the amount of neural fatigue they were creating. I think perhaps moving deadlifts to your Max E may produce some positive results that could carry over to driving your squat up. Much of this depends on staying healthy. I know any time I go over 600 lbs, my back pays a price. I can do 545 lbs for 8, but 615 puts my back out for weeks. I would give it a shot and see what the result is. Perhaps using the method you outline could provide you with a new stimulus to drive MUA forward in your squat as a result of your improving deadlift prowess.