Mineways 10.14 is up. Billboards (like flowers, grass, etc.) are now represented by one quadrilateral instead of two. This eliminates z-fighting problems and reduces model size. USD format export is much more compressed, sharing vertices. Other minor improvements. See whole list here.
Removing the extra quads is a pretty big change, so I'm hoping it doesn't break things for anyone. Let me know if it does for you, what renderer you're using, etc.
A shot from Blender 3.5, using Cycles: