you get adjustment with coilovers just gotta wind weight into or out of them simple as, try do that with a leaf spring. leaf spring would pretty well just act as a locator for the diff with that sort of setup

would take a bit of r&d with springs rates but you can adjust front/rear & left/right weights percentage, you gotta have coilovers in the front to obviously to do that but i'd assume once you got it right would be sweet. not much good for carrying weight tho