Finally got my Cherokee flashed this morning. Kind of a blessing in disguise, but I had an instance the other morning where the Cherokee shifted itself into neutral while driving.... Made it to work and immediately called the closest dealer to drop it off to check it out (and an oil change) There is no service bulletin for transmission on the 2017, but they found a bunch of TCM and BCM updates available, and at the same time, flashed the radio to my Cherokee's specific components.
With only having to pay for the oil change, I think I made out pretty darn good, saved the $99 flash fee, made out with much smoother transmission shifting, and they even washed my Cherokee and had it waiting by the door
the dealership that gave me the most crap about installing the 8.4 uconnect ended up being extremely helpful.
Thank you to everyone on here for sharing your experiences and advice during this project, I would have never attempted to upgrade without this forum! Now I can conclude this project and move onto the next, thinking of side led lights that shine the jeep logo on the ground....