Short of someone writing a py script for this, I don't think there is any way to do what you want, but here are some ideas that might help.

For the poses dropping the figure to the ground problem, that's simple, don't raise the figure by yTran in the hip, use yTran in the Body. Poser does not save pose data for the Body actor, so applying a pose to a figure that has been raised via the Body won't affect its altitude.

If you need to use the "Drop to Floor" feature to compose your scene. Set up all the figures and props for the first floor, but at the Poser GROUND plain level, then load a prop, from its Properties make it invisible, parent all the first floor props, and the figure's Body actors, to the invisible prop, raise the prop to the first floor level. Then repeat the procedure for the second floor props and figures, and so on, finishing with the ground floor.

If you need to use Drop to Floor for the first floor figures, after you have already set up the ground floor, parent all the ground floor figures to a prop then move it to the side, then bring the first floor prop back to ground level.