[Scargoes]

I would think it would be the reverse. Replacing rubber with spherical bearing will reduce deformation effects and give the car a tighter/stiffer feeling. A number of the links in the FE4 suspension already have spherical bearings in place. But you need to think of bind if you replace all the pivots with spherical bearings. Something has to give as the suspension travels thru its normal motion. Since you already have the ZLE subframe bushings, everything else aside from springs and dampers should be equal spec as the ZLE in the rear. Using the FEA front compliance arms will add some feel and reduce deflection in the FE4 hydraulic bushing arms.