Yeah, the ride is probably a bit "too harsh"; but exactly how harsh is too harsh is subjective to an extent.
To help with the stiffness, I dialed down the Rancho's to a softer setting (#2).
It definitely helps to have this freedom, but I *can* feel the stiffness of the springs, manifested primarily as a quick rebound on freeway bumps (this only becomes really annoying at speeds >~70 mph).
Are you running Rancho RS9000s in the back?
Someday I'll upgrade the rear springs but until then I'm fairly content...