I propose the ability to break human skeletons into bones. I think it should provide 6 or 7 bone material and one skull. The skull could be used as bone material or in some future recipe.
Another idea would be to break them for LP. Something like getting 1% of the character's LP for breaking it. I don't want to hear any criticizing about this one, I just felt like throwing it out there
or it could be a follow up of ancestral worship and you could call it defilement - you defile the bones of a fallen hearthling, you have a chance of appeasing your ancestors by gaining 20 numen points, but depending on your tradition/belief slider, it could just anger them, making you lose 20 numen points.
In addition to breaking skeletons into bones (Should come with some penalty, I think), you should be able to bury them for LP and a gravestone with an inscription, and desecrate them for, I don't know, LP, too? Which gives you more LP depends on your Life/Death and Peaceful/Martial beliefs? Something like that.