No, I'm not just stroking off Def and the NRR community at large. Go see how much bind a stock setup has. I tried to do that bumpsteer plot with all the bolts tight. I couldn't get repeatable numbers because it was deflecting the subframe bushings and teetering the car, despite the fact that it was on jackstands. That was with the coil off and sway disconnected. Reducing the bind in the rear makes an easily felt change in the rear suspension.

Edit: screw "easily felt". It's more like unavoidably noticeable.