Aaron, the lift is not helping. But, unfortunately, short of going to a completely different suspension setup, good luck. This is how Ford designs their trucks. They are meant to be abused and overloaded. Chevy's will always have a nicer ride than a Ford. But then, Chevy designs their trucks around being a nice ride, not being able to be abused. Me, I will take the abusability any day. Besides, I bought a truck for the truck ride, not a caddy ride.
You can try lowering the tire pressure down about 5 psi. But, this may also lead to unacceptable tire wear. But, that will make for a nicer ride. Just don't drop too low in the pressure.