I recently tradied in my 2015 Fusion Titanium (front wheel drive) on a 2017 Titanium AWD. I am have the exact same vibration issues with the 2017. I can feel a vibration in the steering wheel and the seat at speeds between 62mph and 80mph. It is very noticeable at 75mph. The 2015 ran as smooth as silk. The 2017 does not. Both had the same Continental tires. I have not had it to the dealer yet for the vibration issue.
Sadly in the 1st week, I have already had a failed tire pressure sensor and one of the rubber boots on a CV blew apart. A new axle/cv was installed. Both issues have now been fixed.
I will reply back after I get it into the dealer next week.