Is it possible that the main problem with the 3-4 is if your LB's aren't absolute studs then you will struggle more defensively than you would with a 4-3. Look at the Patriots they lost Bruschi and Phifer. Add in the loss of Harrison and overnight they have become one of the worst defenses in the league. If you can't pressure and make plays with the 3-4 you are doomed if you have an average secondary. Even the Steelers in the AFC Championship were regularly toasted due to lack of pressure. It seems like a 3-4 will have a greater chance of the 3 up front becoming neutralized because they never get one on one opportunities. This means your lb's have to make all the tackles and apply the most pressure. If they aren't really strong then it renders your d-line practically worthless no matter who is up there and leaves the possibility of your team getting rolled upon more likely. Does this make any sense because it seems that every 3-4 in the past that was dominant had an elite set of lb's? Those without seem to really struggle.