I think it would add a bit to immersion and style, if when a creature dies and had something lootable, they don't polymorph into a Magic Bag of Phat Loot, but remained a lootable body. Or if that isn't doable, as I've seen it done elsewhere, when the creature dies, its body remains, but is made Static, and a clickable invisible placable simply named 'corpse' is spawned holding the loot on its corpse. After the bag is empty, or the timer is up, the loot placable is destroyed, and the body.
Just an idea.
Laaaaaaaaaaaaaaaaag.
It's cool, but this really makes things laggy. Even though a NPC appears "dead," it still fires scripts. We tried this with rats. Didn't work well. Also, removing the body doesn't work well either. It leaves magic blue spots that don't go away!