I reckon that an npc should be added to the end, and this could provide quests for end themed items. It could be located at docks of the end and some of the quests could be like "Kill 10 shulkers" and the prize could be like maybe some cores or some extra shulkers, and then rotate quests to make the end more of a popular location and more profitable, just a suggestion but I reckon more npcs which give in game rewards should be added.