True. However, two years of experience together didnt help the line in the Super Bowl in regards to stunts. My biggest concern is Notebloom handling the nose tackle on the run plays--where Saffold excelled. But if my main concern is run blocking then I'm pretty sure we will be fine. Allen would have to be very poor to be worse than Sullivan.
Center seems an upgrade by default. Left Guard an upgrade pass blocking and major down grade in the run game. I'll take that all day.