I know about this as well. I have a 14 crew cab in the shop needing a new bcm and rear diff rebuild at 4800 miles on the clock. Not even on its first oil change and needs new parts....
FML
I had a 99 Ford power stroke that blew the locker rear diff at about the same milage. Problems followed that fix fix for the next 175K miles, but with less and less severity. First off, they replaced the guts with a non-locker, but did not clean the case. That caused a speed sensor to get coated with debris and nasty burned grease film. It took sensor replacement and a number of subsequent cleanings to keep it operating. Each cleaning then increased the time frame before the next was needed.
So far, with the 2015 ECD, there has been only a slight problem with the electronic throttle linkage, (if one can call that.) And I am not sure that it's been fixed yet. And yes, I am aware of others having the same problem.
Otherwise, I have been loving the truck, especially, compared to the 2011 POS, that the Ford ecoboost was!