All the rewards ( very few) in this game are either super easy to obtain such as pets for entering DLC zones or super difficult such as trifecta mounts. There are very few medium difficulty rewards in the game such as the beast personality. ZOS needs to add more endgame rewards to the game, and perhaps even some sort of achievement vendor where you can spend achievement points, which would incentivize players to participate in more aspects of the game and will take advantage of account wide achievements system.