So far the changes appear to be only cosmetic. Black roof, mirrors, new wheels, new interior trim etc...
I think it all looks really nice. (Although the black roof is a little stupid without a real panorama style glass sunroof.)
But the new trim inside is much better than the cheap and sad looking fake metal they have now. And quite a bit classier than the super fake looking wood trim on higher end models.
This might help the Passat a bit. As it is not a very exciting car to drive, and the competition is getting better and better, quickly.