Obviously, our springs are softer. Thats it. They are softer for more articulation, but you knew that I'm sure. The fix is easy peasy. If you have leaf springs you can do air bags, Timbrin's or these (which is what i have with no complaints)
http://www.carid.com/hellwig/lp-35-load ... gQod8jMJsA To get back to stock, you just remove the outer most 4 u-bolts (2 on each leaf), leave the center in place. Takes 10 min with an elec impact gun.
Other options are, a set of reg 2500 leaf springs but then you will lose your articulation.
If you have a new PW & want less squat when towing, just order a set of rear coils for a reg 2500. but again, you will lose your rear articulation. Easy peasy.
It don't mean you can tow more, it just means you can tow max weight much more safely. Both the truck & the trailer should be level with the ground & toungue weight should be 10-15% of total trailer weight, but i'm sure you knew that as well.