The schedules for the various NPCs and different lighting with candles etc. would be quite a lot of effort. If the resources are there I would welcome it. I remember that even the somewhat primitive implementation in Gothic added a lot of Atmosphere. The nights were so dark that it was unwise to take a long walk late on the day because one could get lost easily. NPCs sleeping and shifts of guards etc. would also make sneaking into the goblin camp and other locations easier and therefore various playstyles would benefit from adapting to the Schedules of potential targets. I would also welcome the NPCs doing a bit more than just standing on their spot all day and wander a few meters around like they did in Morrowind. Of course that does make quest design more difficult and it is already easy to miss some quests without the NPCs moving.
