This kid is only 160 lbs. He also doesn't appear to have the frame to add a lot of weight. I don't think you could ever use him in the backfield like Harvin. Harvin had a thick, muscular build. But, his potential versatility is still outstanding..... bubble screens, quick screens, rub routes, slants, reverses, and the ability to still run go routes. He's a kid that you can move around to create huge match up problems when a safety or linebacker are trying to cover him.
He appeared to have made some improvement throwing the ball in his late season appearances. I wouldn't write him off completely just yet.Heupels already crossed that bridge with him.
No QB molder can fix what's wrong with Milton.