Why were the bushings designed to take torsional as well as lateral loads required to maintain location of the ball joints/front suspension. As suspension moves up and down torsional loads are controlled by the springs and shocks. Why add torsion in the bushings?
Maybe german engineering decided, in its inimitable fashion, that owners were too stupid or too busy to lube zerk fittings a couple of times a year. That must be the logic that gave us $500+ driveshaft u-joint replacement.

Why does the bushing wear and damage from improper preloading before torqueing not GO AWAY with urethane bushings with lube between the sleeve and bolt.? Suppose there needs to be a two centers, one to take the torque of attachment and the second over the first to provide lubed movement.

Would different shocks be required to handle dampening that would be lost without the torsional load added by the factory bushings?

Spring rates should be OK for height because the bushings are supposed to be torqued at zero load (wheels on ground plus added weight to equal three passengers, luggage and full tank of fuel)..