All I have 2016 Ecoboost that has developed steering wheel shake at speeds from 45-65 mph , Past 65 it stops or is not noticeable. And also no shake at slower speeds under about 45 mph.
I also even swapped out all four wheels / tires from a 2015 that own thinking it was the cracked wheel or out of balance issue on tire(s) Both sets of tires are basically new and lots of tread left on them. So the second set of tires that are on the 2016 doesn't make a difference and the steering...

Steering Wheel shake 45-65 mph 2016 Ecoboost