In the latest footage the vegetation was looking very good. If I look hard enough I'm certain I'll find something to complain about, but I'm happy with the overall looks.
Yup, foliage/vegetation looks great imo, could be better of course but looks very good for open world game. Just watch this PietSmiet gameplay from Skellige:
http://www.youtube.com/watch?v=ALGJGDRnHT0&index=3&list=PL-eQ-r5zap7KC6cXXFep03Afrpip8OkBi