Hi,
I think users would benefit from new tools to distribute meshes with various kinds of rules and tweaks governing the distribution.
Please look at Forest Pack Pro for 3ds max. I wish I had something like this for Unreal Engine.
Or…
Simply make your own new presets for a fast automated creation of grass and Forest
Maybe there are some ways to do it ( I am still just beginning to learn Unreal) but the functionally seems to be limited compared to the above-mentioned Forest Pack Pro plugin for 3ds max