One of my biggest issues is the rendering of buildings. I like to fly low over villages. Now it seems that, instead of all the buildings being rendered in 3D, now only some or even none may be rendered fully.
Sometimes the buildings are plain blocks. Sometimes they are not rendered at all - flat pictures from Bing maps.
This is a small village that usually looks good. Note that I pre-downloaded the area to the manual cache so that internet bandwidth couldn’t be blamed.
Here, most of the place is just a flat bing map. No rendering of buildings.
I have many more examples that are destroying the immersion, as well as all the problems others have mentioned. Both the screenshots are ultra settings!