So I've been thinking about how to make a 1-ton ride softer without sacrificing the payload they can hold...

I like the idea of the main springs and auxiliary springs where you can have two different spring rates based on deflection. Why did Chevy make the main springs ~75% of the force and the auxiliaries just add another ~25%?
Why not do this the other way around... Have a real soft spring for the first 1-2 inches of travel and then have the big springs kick in... This way in normal driving you have a soft ride and then once you add anything to the bed you engage the big boys...

So I've thought of two ideas:
1) Go to a spring shop and have then remake the stack with the same total number of springs but pitch them so there's ~4 on the main springs and ~7 on the auxiliaries.
2) Break apart the current stack and just swap positions to get as close as you can to option (1). I'm just not sure if there is a max difference in length between two adjacent springs that support each other without concerns of cracking one.