Hi Dan,
These effects seem to be ‘features’ of the photogrammetry processing and appear to a lesser or greater extent in all photogrammetry areas. We can only hope that in time whoever is processing this data to give the 3d imagery will get better at it…
You can turn off photogrammetry in the data options. If it’s an area you know, it will then probably look pretty generic; but if you’re not familiar, it can be good.
There has been loads of debate on the topic, this thread has some interesting comparisons between photogrammetry and autogen scenery: