Could there be an upgrade to Capers that helps? Sure. Its probably one of three or four guys if you want a guarantee.

Could there be an upgrade to the DC that would align the personnel to a coordinator who will adjust the plan to the players? Much more likely. But this is as much personnel side and coach side. Seems like it needs to happen. If you want a critique of a failure of Thompson/McCarthy, this is it. But be clear, the defense probably doesn't play better overall, but is more consistent and less likely to get blown out in playoffs. That might be enough.

Better and easier still: sometime after 2009, hit on a game changer of a defensive player in the draft.