Okay. I think I see what you're saying. Here's how I would explain it:
1) More 3-4 defensive changeovers = fewer 3-4 ILB legacies. Most of the league has changed over to a 3-4 defense in the last 5-8 years or so. That means that there are fewer 8-10 year veteran 3-4 ILBs. You have a ton of Tampa-2 type MLBs out there, but they're generally too small to transition smoothly. Thus, there are fewer mid-level veteran ILBs to sign in free agency and the offseason.
2) There are more "elite" MLBs/ILBs than ever. For a half-decade, the only "name" ILBs were Patrick Willis and Brian Urlacher. Now there are five to ten elite guys in the middle of linebacking corps. That should be a good thing--unless you're building your defense around them. It's hard to replace Peyton Manning if he gets injured with a similar player. Teams are finding the same thing with MLBs.
3) Attribution of resources. We've talked for a while that teams are spending less on top inside linebackers and safeties. What that means is that if you have a $4-6M ILB, it's tough to pay anything like that to a backup. If you're a veteran player, it might not make sense to put your body at risk for the veteran minimum, so you have guys who retire rather than play a #2 role.
I think we are on the same page. Great point about preference of resources. Too bad DWaste is taking up a lot of resources and giving back nothing.
Here is a list of players I would deem a "every down LB talent". Good in coverage, Good against the run.
And I was trying to be
very generous.
Some are
questionable, some are unproven, and some are injured.
Right off the bat, the research showed the AFC north has a glut of linebacker talent. Teams like the Ravens, Patriots, Bengals, and 49'ers have a lot of talent at the linebacker position.
Bills - Kiki Alonso (inj.)
Jets - David Harris ?
Patriots - Jerod Mayo
Dolphins - Danell Ellerbe ?
Bengals - Vontaze Burflict/Vincent Rey
Ravens - C.J. Mosley (unproven)
Browns - Karlos Dansby
Steelers - Lawrence Timmons/Ryan Shazier (unproven)
Texas - Brian Cushing
Colts - _____
Jaguars - Paul Posluzny
Titans - _____
Chiefs - Derrick Johnson
Broncos - _____
Raiders - _____
Chargers - Manti Te'o (unproven)
Cowboys - Shaun Lee ?(inj.)
Giants - _____
Eagles - _____
Redskins - _____
Bears - DJ Williams?
Lions - De'Andre Levy
Packers - AJ Hawk?
Vikings - Chad Greenway?
Falcons - ______
Panthers - Luke Kuechley
Saints - ______
Bucs - Lavante David
Cardinals - ______
Rams - James Laurenitis
49'ers - Patrick Willis/Navorro Bowman
Seahawks - Bobby Wagner
For every down linebackers, that is who I would list for the league for each team, and please anyone feel free to add to the list and give me a reason why that player should be on it.
Also, remember I was being rather generous, if you think someone should not be on the list, please make an argument for it.
But, remember that have to be able to play the run and go back into coverage.
I still think its a position that is a little light in the league, but K9 is right, a lot of those players were not 1st round picks, or "elite out of college", and there are more elite guys out there then 10 years ago.