I hope they add in something like the crypt system in Skyrim. If an NPC died, their grave would appear in the crypt with a name plaque and everything. There was something very emotional about that.
I would love to see the ability to build cremation furnaces and a rack that would populate with urns, vases, or small boxes of ashes. As your settlers died, the 3-day (7-day?) clean-up would result in bodies being replaced with another "urn" on the rack. Wouldn't be too hard to create a nice, random naming system for Settlers, either. That way each "urn" would display the name of the Settler when you moused over it. Doing it this way could ensure the engine could keep track of existing Settlers after they died, if it needs to for whatever reason.
I'd say graveyards, but I think they would eventually wind up taking way too much space over long playthroughs.
Heh?
All of the Bethesda games since Morrowind have featured respawning enemies and organic containers. The only containers that would NOT repopulate were the few, special ones marked as "non-organic" which would hold various special quest items or whatnot.
Plus, doing it this way seems to have killed most of the "bloat" that affected save files in all of the other titles. I admit that respawning does feel relatively fast in FO4 -- which I totally don't get, as I think they increased the duration of time required before areas repopulate. (Just goes to show how big the map is, I guess!)
You are a sick and twisted, utterly demented individual...that makes perfect sense and would likely become a community leader in an irradiated wasteland.