I have a 2012 3500 and my brakes definitely work great. I find that they are more responsive and touchy than my 2012 1500 was. However, there's probably a different power assist system on mine since I have a Cummins and you have a Hemi.
I would definitely test drive a few other trucks at your dealership or surrounding dealerships to be able to get a feel for them as well. Find out of they're the same as yours or not. If they are, then obviously that's just how they're supposed to be, but if not then you know your answer and you can go back to your dealership with that information. It will be on them to make sure it's fixed.