Update:
We have had our 2015 since early March and now have a full 5 days of towing on her. I have to honestly say, that the ordeal to get our 2014 replaced with a 2015 was horrendous, but in the end, it was worth it.
The 1st 3 months of use were all unhooked and we feel; she drives & handles better, the front doesn't sit as high and has a smoother ride. We hooked up on June 2nd and headed out of Dodge, er make that Casa Grande, AZ. The transmission shifts smoother & she pulls hills like a dream. Keep in mind they are not the mountain passes out west, but we're pleased.
It does have a more comfortable ride as far as the seats go & overall ride and Dutch feels that the truck is tighter. The round town mileage was at or above what our 2014 was {at a year} and hooked up we are pleased as she isn't really broken in yet. A bonus is the mileage gauge numbers are extremely close, if not on point, with our manual calculations. The radio is better and the navigation far surpasses the 2014. Only "issue" so far is the tpms on the passenger side inner dually stopped working 1st week and they are on back order til August so we are told but Dutch is working with a guy to get that new sensor sooner.
This is what you are supposed to get when you lay out this kind of money. While it doesn't yet match my "Love Affair" with beloved 1996 Ram, the 2015 is working hard to win it's way into my heart and so far is doing a bang up job. If/when I come up with more good points, I'll post again. Hugs, Di