While what you listed are effects on the system, the impacts you suggest are implying that the suspension system is like a go kart and all things are the same, where in this case, they are not. We are discussing the lever arm of force that is being applied to the chassis under compression. If I were to solid mount the suspension system, it would cause the same issues and the force would be applied to the chassis instead of being absorbed by the suspension. By making the suspension too stiff for what it was engineered to withstand, you will accelerate the fatigue to a car that we all already know was not assembled to the highest of standards. And these failures aren't brand specific. Look at the fatigue issues that the Mustang guys have with their spring pockets. They figured it out quicker, and then even Mopar jumped on board with engine compartment bracing.