Well it's all based on your talent. If you look at the top 10 defenses stat wise this year you have 5 teams that run 3-4 and 5 teams that run 4-3.
We don't have 3 good LB's how will we come up with 4?

Again, it's not about how good the players are. Everyone wants good players, everyone needs good players. But how do you get the most out of whatever you have? We've tried 4-3 for a million years in a row.

And of the top 10 defenses, how many 3-4's were in the top 5? Top 10 isn't dominant. When I say the best, I mean the best.

We have a couple pretty decent linebackers in Lofton and Hawthorne, and I think Martez Wilson would do well as one of those hybrid DE/OLB's that you see in a 3-4. How many good defensive linemen do we have?

Actually only two 3-4 defenses were in the top 5. Pittsburg and 49ers.
Denver, Seattle and Bears run 4-3.

Actually only two 3-4 defenses were in the top 5. Pittsburg and 49ers.
Denver, Seattle and Bears run 4-3.

Denver has superstars on their defense. And very few teams ever run the 3-4. Why is it that those who do, are so highly ranked? I've well said that you can be successful with great players under any system, but I'm more impressed with coordinators who can make any group of players at least decent. With four linebackers, you can cover more people over the middle, and you can move them up when necessary. There isn't much size difference between an outside linebacker and a defensive end.

You seem to believe that defensive rankings from one season mean that my point means nothing, when the fact is that almost no one runs anything but a 4-3 anymore. And it is my opinion that this should change, unless we come up with some great players real soon.

Green Bay isn't highly ranked, the cowgirls aren't highly ranked and they run 3-4 scheme. Look, I'm not trying to pick a fight here but if our current defensive players can't learn Spag's zone scheme, they damn sure can't learn 3-4 schemes which employ some of the same zone schemes. First off, who are the 4 LB's?
Vilma couldn't play the 3-4 for the Jets that's how we got him. Lofton is a MLB also. Your LB's have to be able to rush the passer and also play coverage. The idea of the 3-4 is that you can change up the LB that blitzs so they have to be fast and strong. I don't think we have any LB's that fit that description. We also don't have a NT to take a double team. What would be our line up? I just don't think we have the personnel to switch to a 3-4.