The brochure dry weight for a 2011 Lance 830 is 2322lbs. Add for options, water, propane, and stuff... Probably pushing 3000lbs+ when all is said and done, and that is not even counting passengers.
Normally I'd be in favor of the new technology, especially in this day and age where it can't possibly be a totally awful dangerous failure, but I agree you should probably stick with a leaf sprung truck considering that you're maxxing out the rear axle rating on a 2500 series truck now. There's no data on how a coil spring truck would deal with being maxxed out or mildly overloaded over the long haul.
This coil spring 2500 RAM, IMHO, is an attempt by RAM/Dodge/Chrysler/Fiat/whatever to bring the 2500 truck into the "grocery getter" category. For those that are towing 7000-10000lb trailers and need a little more than a 1500, but don't want the harsh empty ride of a leaf sprung 2500 or 3500 during the 98% of the time they're not towing.