What a ridiculous concept.
The only difference between the 2012-16 and 2017-18 is TCU programming. Applying the TCU programming from the 17-18 to the 12-16 cars hasn't fixed the issue yet.
The issue is not and never was "programming". It was poorly thought out design and putting what is essentially an automated manual transmission in an economy car. Far too many people treat it like a torque converter run automatic, and allow it to slip at low speed, which generates heat and dust. This dust clogs up the internal workings of the shift forks, putting more strain on the shift fork motors, and thus more strain on the TCU, causing TCU faults when the motors can't properly actuate the forks.
The only true "fix" is to either drive it like a manual since day 1 (which we have lots of people who ride/slip clutches, so even that won't necessarily work) or replace it with a more modern torque converter equipped automatic. But, that actual fix will cost Ford a lot more than just scrapping the idea of the car and leaving us out to dry.
My personal experience, my car is covered, but is on the tail end of coverage both on years and mileage. When I get it back, if it's not right, it's out of warranty, so I'll have a hell of a time getting it sorted back out once I take it off the lot. Add to it that the parts are very backordered (over 60,000 on order), and I am not interested in putting forth the work to convert to a manual transmission, I'm tempted to just sell the car. I also had no traction getting my dealership to get me a loaner while I'm without my car (also covered under the extended coverage), so I had to call Ford Customer Service to get that handled. Finally, living in Northern Minnesota, my dealership didn't bother to disconnect my battery while it sits on the lot behind the service shop, so the battery died and froze in the week of -20F actual temps we had recently. I found out when I went out to put the replacement license plate tabs on it, and couldn't unlock the car with the remote. Used key, popped hood, bulged battery. Ford doesn't claim responsibility for that, even though they know it'll be there months.
So I'm soured on Ford for now. Doubtful I'll buy another based on dealership experience alone.