The ideal composition for a defensive depth chart is to have athleticism outside and experience in the middle. Everyone wants to have experienced and athletic players all over the field, but while a defense can get by with young athletes in space, they can’t really get by with slow players. Similarly on the inside, everyone wants explosive tackles, linebackers, and safeties, but it’s essential that players inside can diagnose plays and get in position quickly. Speed is useful but only if paired with that quality.
One storyline that presented itself this off-season was the cute little debate of whether or not LSU or Florida is the real DBU. Recency bias must exist so lazy writers can renew debates long since settled. If the secondary of the national championship didn't solidify UT's standing as DBU, then the resurgent and youthful defensive backfields of 2008 and 2009 did.