Regarding Branch, I don't hold 350 [? ] pound linemen to the same standard as a 180 lb slot receiver as far as being in shape/motivation. We are spoiled by the amazing Vince Wilfork in that regard. I think all 350-400 pound athletes struggle at times. Imagine, if you feel good or bad, you still have to lug that amount of weight, or even stand on it with your feet and legs. Branch was a decent tackle his first year or so just because of his size, a great one due to health/motivation the last couple.
If we don't use Branch, we'll need to find something like him and good luck with that. BB actually has said that athletic big men are the most valuable because they are so had to find. Without Branch, the dropoff to Brown is tremendous, the dropoff after that is basically keeping an extra player in and distorting the defense. They don't have two giants without Branch and Valentine and probably not one.