I'll just lay out my ideas here with a modicum of rambling.
I'll use the coffins as an example for my first point, you can't interact with them. You can sit, stand, and leave. The bed should be a seat, because why the heck would you "sit down cross-legged on the floor" when you could sit on the edge of the bed?
Examples of things you should be able to sit on include steps, ledges on roofs, cars, corpses, etc. Just a thought.
My more important idea is this: containers. AFAIK, they don't exist ingame, and if they do, I haven't run across one yet. I think this should be technically possible, the commands could be as simple as put, take out, open, and close.
-Backpacks/satchels/purses/duffels (medium-high capacity)
-Pants (very low-low capacity)
-Coats/jackets (very low-low capacity)
-pouches/baggies (very low capacity)
-boots (weapons or baggies)
-chests, car gloveboxes, closets, cabinets, etcetera.
Third and final idea: posing equipment. This one is a simple concept, and one I would dearly love to see implemented. You could roll up pant legs, lace-unlace shoes, put up-down hoods, roll up sleeves, tie shirts at your plexus, zip-unzip pants/jackets, turn pockets inside-out, etcetera. My idea for executing said idea is this:
*Being able to change the sdesc for the items of clothing, just like nakeds. Color and material would be immutable, but anything else is up to the imagination.*
If any of these exist already, you guys are freaking awesome for having them and I'm just clueless. If not, they're just ideas, do with them what you wish and tell me what you think.
Happy Roleplaying! :)