^^^^ This!! 1: there is a tremendous amount of torque management applied right from a start to reduce the stress on driveline components, you can really notice it on the 1-2 shift, 2: the engine needs to be at at least 3000 ram to start making any kind of tq/hp.
I've noticed that my truck is working better after each time I pull our holiday trailer, when I'm pulling I use the trans in manual mode and keep the rpm's up while pulling hills.
I also had a 2014 1500 for awhile and it to worked better if you drove it like you stole it. I do believe now that these trucks will "learn " how you drive and adapt.
Try getting on the throttle for a month and see if it gets better.
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