Yeah, the Eibachs are variable and they seemed to work fine. If one is trying to be technical, most shocks are valved for a linear spring rate and the variable springs also tend to unload the suspension more abruptly than does a linear wound spring after launch.
In the back of my head, I keep thinking the springs on the other car are variable rate but I might be wrong. It has no problem with the tires even with someone in the back seat. At any rate, spring or not, I sent $42 for a pair of standard replacements to the Rock.
Eibachs still on the front at this point. For sure they resist weight transfer