I believe this was requested with many people once 4.8 came out. I couldn’t find the threads to bump them so here it is.
We absolutely need a min/max scale variation parameter exposed to the landscape grass output/grass type feature.
As of this moment it’s a big problem to use this tool because every single instanced mesh is exactly the same size as the other, not having the ability to have a size variation for things like bushes, shrubs rocks etc.
We would really appreciate if you finally put this in the to-do list.