I think you're just trying to make yourself feel better about the Lions, but ok.
Defensive Line:
Elvis Dumerville's injury last year basically crippled us as a defense last year. He plays the defensive end/linebacker hybrid position so I'll mention him in the other section too. But what we missed last year was a pass rusher. We finished near the bottom (if not dead last, I honestly can't remember) in sacks last year. Just watching our games, we couldn't get any penetration in the backfield and it felt like anytime a team ran the football, they were never even met at the line of scrimmage with one of our defenders, let alone hit in the backfield. We need someone who can not online beat an offensive lineman off the ball, but we need someone with the strength, agility, and determination to bust through and bust some ass. This past season (and really, the last few years) we've looked more lethargic on the defensive line than any other team I can remember watching. Even two years ago when we had Mike Nolan's defensive schemes, we still just didn't possess any playmakers on the line to create any mismatches. Our defensive schemes hardly ever called blitz which meant our line had to go it alone. And when you can't break through with three or four man rushers, you give the opposing quarterback to sit on his butt, scratch himself, then find the open man. It all starts with our defensive line, and I'm drooling at the mouth that we have a chance to get Bowers or Fairley in April.
Linebackers:
A couple years ago, we took Robert Ayers in the first round and I was ecstatic. Ayers was going to be the linebacker that busted chops and forced offenses to gameplan against. Well, fast forward back to present time and that just hasn't developed. Granted, it's been two injury-plagued seasons for him, but he has yet to show any little flash of what his potential was. DJ Williams is an another former first round pick of ours, but one that panned out and did wonderfully. But he's been arrested more than a couple times for DUI and is facing possible suspension. They guy is a former Miami University player, so I'm just going to leave it at that, as opposed to go into much more detail about how law-abiding he is. Dumerville coming back is going to be a huge help, but over on the other side, I'd love for us to find someone quick and that can cover in the mid-rounds this year. Someone fast enough to get in there and hit the quarterback on blitzes, but someone who can drop back and help in coverage when Elvis is sent in. Maybe I'm underestimating Ayers and he'll step up and deliver once our linebacking core is more healthy, but I'm not as hopeful as I once was.
Defensive Backs:
Champ Bailey has not found the Fountain of Youth. Opposing quarterbacks are still hesitant to throw his way, but for how much longer? He's already said that if Denver wants to keep him around, he's going to be moved to Safety. Champ will be 33 by the time the new season starts and Brian Dawkins is going to be 38. We need quite the youth movement back there. It should be interesting to see if Elway and Fox go defensive backs with our pick in the Second Round (and really, the third round) because that's one place I think would be perfect to build up now while Champ and Brian can mentor them.