I did the exact same and it got worse once my mav went into production and then even more so when it was enroute via train. I was always watching pov driving videos to get the idea of what it would be like lol.
Yes its in the order guide, they broke it up and removed the ACC/lane centering, evasive steering assist, and rear parking sensors. They are no longer in the lux package and in theri own addon package to CP Assist 360.
I figured that, unless of course there was some stripped down display but i doubt it. It would be super dumb to not give the tremor the 6.5 screen if they already do it for the fx4.
The last liquid to liquid oil cooled turbo vehicle i had was a 6.0 powerstoke. What a effing nightmare that system was, so bad that I had it converted to a air to oil setup. Brutal to get warm in the winter though.