I'm still a huge fan of AT. I think he will be great.
Obviously, I'm not fortunate enough to see practices. One thought, playing Newby and redshirting AT makes for a perfect progression on the RB depth chart for the next 5 years. Newby is similar to Ameer, fast big-play threats, and he will follow him two years and then take the reins for two years. AT is a bigger back, akin to Cross, and will follow him for a year or two and then take the reins for years. A perfect progression on the depth chart, getting experience at the right times, and not wasting any eligibility.