I had a similar problem in lower gears, i don't remember it doing it if I was at highway speeds though. With the 3.5 they can also squeeze quite a bit more power out of it too, so there's that.
Skip shift is gone for starters, which makes parking lot cruising/pulling out into traffic less irritating. With the stock tune, I felt like the truck either wanted to either surge in 1st or bog down in 3rd at medium throttle rolling out of a parking lot.
Overall though, it's just more...
The wheels dont do it for me. I also don't really care for the front end either. Something about the lack of grill and the LED trim around the headlights/grill just looks kinda... cheap, like a plastic toy truck or something.
This may not help you any, but disabling it in Forscan will not cause the button light to light up like it does when you manually turn it off. However, when you're sitting at a standstill, you should still see the icon on your gauge cluster that indicates that it's disabled (it's the (A) icon...