I hear your concern, but I'm not sure what's fueling it.
The only things that really matter are whether your rig is set up to operate within the manufacturers specs (truck, trailer, hitch, tires) and whether it is safe and comfortable for you as the driver.
The specs and limits on your specific truck will be on a sticker that should be on the post of the driver's door. Dodge does publish general specs which can be found here:
http://www.dodge.com/bodybuilder/2007/docs/dr/mlup.pdf A typical 2500, quad cab, short bed, diesel (top of page 9) has a gross weight rating of 9,000 lbs, a rear axle rating of 6,000 and a front axle rating of 4,600. You are under those weights even without your WD bars. You might want to read the tire limits on the sidewalls of your specific tires, but if the truck has proper tires those should not be an issue. I did not see any published tongue weight ratings in the Dodge specs, so that should be researched, too.
Coming full circle to your original post, you could step up to a stronger weight bar, but given the FALR of nearly 100% and the capabilities of the 2500 TV I'm not sure I would do that.
So.... what is it about your current setup that you think should be improved? Lots of folks (including me) pull more trailer with less truck. Our 25 Eddie Bauer is heavier than your FC by a bit. The Tundra has lower limits all around than your 2500. We've towed 20,000 miles including four passes over the Rockies in total confidence that truck, trailer and hitch are near, but not over, their design limits. I'd set aside the RV guy's weight taken at your tongue jack since you have more precise, specific and detailed measurements from the CAT scales and those seem to say you are not exceeding any manufacture's limits.