Looking through some of DU's released info i noticed plans for an active day/night planetary cycle.
As an old time DayZ mod veteran i was absolutely thrilled by the concept of navigitating through a pitch black landscape.
Imo it would be like a dream come true if DU were to follow DayZ's mod formula of nocturnal navigation.
Forcing players into illuminating an area and create light source infastructures could possibly add a new layer of gameplay.