Why you want them to leave? You cant replace them. They are at least good for depth. Unless you think we'll get more IC from the NCAA we can't just run everyone out, coach them up.
Bring back all the talent you can and let them fight it on the field for playing time.
Ford is one of our best run stuffer at DT.
Plus having a lot of older guys back is a plus, even if less talented maturity helps.