Parcells wants to be able to not have to go to a 4-2-5 to get a pass rush. He wants to be able to go from a 3 to a 4 man line, zone blitz and have that 4th rusher coming from any spot. Ellis does not have that ability.
We got our pass rush with Ware on one side and Ellis on the other and both were playing DE for the most part. To run a true 3-4, you need to be able to bring any of your LBs or drop any of your LBs, Ellis doesn't make that happen.
The only reason to run a 3-4 is to be able to confuse the offense, we ran a vanilla 3-4 on early downs, and went 4-2-5 whenever we faced 3 wide. This defense will not reach the next level if you go half way.
We need to replace Fujita and Shanle as starters. We need a solid, intelligent guy in the middle to take over the calls from James and free him up to use his athletic ability to make plays. We need a playmaker to go opposite Ware.
The best way to do that and fix the OL is to have extra picks and more cap space.