The beauty of the 3-4 is that you can play 4-3 at times with it. However, if you're a 4-3 team, you usually are stuck playing with that the entire game since your personnell isn't really suited for it.
I don't think Ware is really suited for the 4-3 and the problem with the defense is that it struggles to get consistent pressure on the QB. They've defended the run very well up until the NYG game. Since the tendency for 3-4 defenses is to struggle against the run, I don't see the 3-4 as a problem.
The major problems is that we lack some defensive creativity, we don't disguise blitzes well and we rarely stunt. Plus, we need one of the 3-4 DE's...either Spears or Canty to start coming through. Teams can either use man to man blocking and have a 3 step drop to avoid Ellis and Ware. Or they can double Ellis and Ware and use 5 step and 7 step drops. If Spears or Canty could occasionally force teams to double team one of them, it would make things a lot more difficult for opposing offenses.
YAKUZA