Minor thing: I noticed water surface was uneven in places for some inland water: 1,2 (near BIVI). Don't recall issue with old terrain, not sure.
Just in case it's not known: Some issues with streams / rivers. Both old and new terrain. Old: 3,4. New: 5. Didn't mention as I thought it was known by now, or may just be bugs with integrating water body data that goes away in 2.1 scenery..
Kind regards