From the factory the coils are rated to carry 500 lbs less than the 3500's leafs. Not really a big deal. They do ride and handle very nicely for a heavy duty truck. The lower payload numbers on the bulk of the 2500s has everything to do with the class 2 max GVWR, except on a few of the base 5.7 trucks equipped with 17" wheels and tires.
GWolfe, there is no light load button anymore. I don't see the TPMS as much of a negative. I run at 65/80 during towing season and 65/65 during the offseason. I guess a quarter inch indicator light on the display bugs some more than it bugs me.