The Nautilus already is made in China. Honestly after driving one for a month (I have a 23 BL but got a 24 BL as a loaner for a month) the fit and finish is just as good as my Canadian made Nautilus. My only gripe was SYNC 5. Its all Google ran. And My issue with Google is how quickly they abandon their products for support. Now maybe Ford/Lincoln had them contract binded to support it for X many years I don't know for sure. But I'm also a diehard Apple user and really loathe Android OS. So SYNC 4 is much more my speed. I also think my interior is more classic Lincoln. I like it better. The new Nautilus DOES have some really neat features I wish mine had, like the heated wipers with the integrated spray nozzles. And the digital scent and rejuvenate features. But other than that, I like mine better.
With all that being said, the quality is no different than mine, or my Wifes 24 Corsair RII. Id expect fit and finish to be the same on the new 27 Corsair made in China or not. Where something is made doesn't necessarily make a difference in quality. My Mexico made 16 Fusion Titanium has 291,000 miles on it, and everything still works and it rides very nicely for its age and mileage. I think honestly most people take politics into too much consideration and let it get in the way of reality.