Pose libraries
Some clothing in appropriate for some poses. I'm thinking mostly skirts and any poses where legs are spread or raised. It would be nice to see a pose library for kneeling, sitting, sitting on floor, etc in skirts/dresses. Perhaps split between tight and loose skirts. Or maybe split by length (calf, knee, mid-thigh).
Also a kids pose library would be cool. There exist some teen libraries that aren't terrible for kids. A 5 years old child sits, lays on the floor, etc differently than a 12 years old or a 50 years old.

Comments
Just poses for figures, or are you wanting matching drapes for the items? Aave Nainen did some things like that before dForce https://www.daz3d.com/aave-nainen