Generate less points? (ei: feed in a smaller area to sample?)
No where does it say that you can’t re-run PCG several times in different areas… so if you are concerned about “this zone is too small”, well, don’t be. Duplicate the thing and run it again over a different zone.
The nicety of it is that once you are done the stuff/instances are placed and can even be completely unlinked off PCG.
Matter of fact, I’d suggest just outputting mesh name → transform into a CSV, and creating a system of your own that adds the instances into the level using other (more compatible with older systems) methods - like Foliage and custom HISMC inside dedicated BPs.