P.S. box rebuild FirmFeel or Steer & Gear?

I don't "hate" them. They do what they can for the factory design. They are limited by the design constraints of the unit.
Think of it this way....If you take a 1950s straight six and did every trick you could think of, (porting the head, extrude hone the intake and exhaust manifold, add EFI, electronic ignition, etc) The six will still be slower than a 5.7 Hemi because of the improvements of the modern design.