My 2015 2500 has plenty of brakes...but it does have a firm pedal at the top. I especially noticed it after coming out of the F150 I swapped for this truck.
I drove my 2003 1-ton last weekend for the first time in about a year, and was reminded that it too has the firm pedal from the top. That truck never had braking problems--at least not from the perspective of "not enough brakes."
Personally, I like the hard pedal, and only have an issue after I've been driving something that's overboosted like my F150 was. Of course, I still have manual disc brakes on my '72 Plymouth and I prefer that setup to the power brakes on my 67 Buick....so I'm probably an oddball.
kthaxton is right -- plenty of modulation and a very progressive system overall. It gives great control and feel throughout all loading conditions.