We don't know for sure yet if its just a flush, or something more. The big detail is in what this "tool kit" is. As posted in another thread...maybe its a TCM flash or just a fancy funnel?
But if its just new fluid again...well that does seem disappointing to me. I mean, the original explanation was that early 2016 models had fluid in it that wasn't any good (in simple terms lol) so they started using new fluid, and changing cars with the old fluid to the new fluid using the TSB. So now they would be saying "Wait no...this 3rd different kind of fluid is REALLY what it needs". Riiiiiiiight.