Hidden Missions Within Missions
With the release of Destiny: The Taken King, Bungie knew that it had to do more than just add a new area to explore and a boss to defeat. The developers decided to add brand new missions that can only be triggered at certain times and by completing specific tasks. These “side-quests” have lead to powerful exotic rewards for surviving the difficult challenges they pose. This is something that The Division should definitely implement into their game, especially since the world has shrunk after recent announcements.
It’s already known that players will be able to jump back into completed missions on higher difficulties in order to obtain better loot, so why not hide a few extra objectives where they can obtain something truly worthwhile? Maybe a specially customized handgun that shoots ricocheting bullets can be discovered in a secret room within the post office. The Division could add tons of replayability and challenge by implementing these sorts of details.