One of the biggest weaknesses I've seen with games like No Man's Sky and Elite Dangerous is that their content is entirely reliant on the developers. Beyond story quests there isn't much to do in those games. As such, I believe that to make a truly great space sandbox, the game must give players the ability to create their own content and be able to easily share it with everyone, which Dual Universe seems to be aiming to do.
With that said, does anyone have details on what kind of features there will be regarding creating your own quests for other players? With a robust quest creation system, players could send other players out to get materials for them, hire assassins to take out other players, organize heists, or even make up entire backstories to go with a collection of quests. The potential here would be enormous.