This is a point I've made elsewhere: We need to stop drafting combine freaks from the low-rent districts of college football; that is, places like Richmond, James Madison, Troy State, South Dakota St., Central Florida, etc., and go after major program people. Yes, there will always be exceptions--in both directions (e.g. Arron Maybin on the negative side, Fred Jackson on the positive ledger, etc.)--but big time school & conference players are generally going to be better investments over the long haul.
I'll give exhibit A: David Nelson, non-starter at Florida, but able to adapt pretty quickly to the NFL.