I would love to see burials as a mechanic in this game. It would provide a really interesting choice for players when they encounter the corpses/husks of other players.
The way I envision in-game burials, broadly, it would take some amount of time, maybe a full minute or two of uninterrupted concentration to enact the process, and it would provide a benefit to the deceased WITHOUT providing a direct benefit to the adventurer performing the burial.
So why waste your time burying someone else if it isn't going to help you? It is a choice to perform an altruistic act (please don't argue the definition of altruism here, replace it with 'pro-social' if the previous term offends you). Good aligned players might feel inclined to bury the body to aid the deceased in their next life (which happens to be starting immediately one hex away). Evil aligned might feel just as inclined to loot.
Perhaps the benefits conferred on the deceased through burial are:
-Reputation bump
-Reduced death penalties (whatever those end up being)
-Hiding the corpse from other players and preventing looting (or making looting more difficult by incurring an additional reputation downshift for grave robbing).
Or maybe the corpse is surrounded by monsters and you just can't spend the time clearing the path and defending the body (or have your friends defend while you bury), but passing by nags at your conscience so.
Could be a very neat effect on the player behind the character as well.