Thrall, Vex, taken, Cabal, bosses, etc. are all old news and boring. We have been seeing them from D1 onward. The only difference is new planets and maps. New enemies with new planets would be a nice change.
[spoiler]Moderator edit: This thread has been moved to #Feedback forum so that other Destiny players can weigh in. See [url=https://www.bungie.net/en/Forum/Post/139533839/0/0]Cozmo's thread[/url] for more information about the #Feedback tag and its uses.
Feel free to private message the moderator who moved your post, link to topic for further clarification about why this topic was moved.[/spoiler]