So basically he bought the wrong truck? He bought the Power Wagon when he should have bought the regular 2500 or even better a 1500 with air suspension.
I'd trade it in, the hit he takes now will be less than later when he tries to sell it. If not he can probably pay someone to swap out the coils and whatever else they changed underneath. But again by the time he pays for that, and takes the resale hit it will be cheaper to just trade it in.
This is why you see vehicles on the lot with 1500 miles on them. Depending on options the truck should sticker for mid $60k; does it have the sunroof and leather? Ram Boxes? 8.4in Uconnect with navigation? Sale price before taxes was probably around mid $50k, since gas is cheap and that's a popular model he should be able to get a decent buck trading it off. Maybe high $40k range, to $50k.
It should be fast that motor puts out 420hp and it has 4.10s in it. Sway bar disconnects and electric lockers front and rear, as well as the winch and Bilstein shocks; its a serious off road vehicle. The only downside is the switch to Goodyear tires from BF Goodrich. That happened
AFAIK for the 2016 models which that should be.
All that truck needs is a set of bead lockers and some better tires to be seriously unstoppable.