I've watched a number of good 3-4 Defenses over the years and I'm not sure how effective they can be in today's NFL. The reason for that IMO is the size of the O-Lines. They are huge and you may be asking for a little to much to expect R. Smith, S. Payne and G. Walker along with an outside LB to take on five big uglies. In the 90's Buffalo was able to run the 3-4 because of DE Phil Hansen...NT Ted (Mr. Big) Washington and future Hall of Famer and all time sack leader DE Bruce Smith. Plus....two OLB's in D. Talley & C. Bennett to put heat on the QB. We do not have "those type" of players currently on our roster.
The issue is not whether I'm right....the issue is you're wrong!