If you think Menagerie is just a horde mode, I'm sorry. I don't feel that way at all. As for replayability, games that have a dedicated "story campaign" I have never gone back to replay. You can have the greatest campaign of all time, and I won't replay it unless it has VASTLY different story driven choices to make. That was even a reason why a good chunk of games (Titanfall, Call of Duty, Overwatch.. list goes on) decided to go without a campaign. People don't replay them. I loved the Forsaken story, but I have yet to replay it fully because I have zero interest in going through the same story. I would much rather have a developer work on content that people WILL replay. As for Destiny, I really enjoy the idea of one large story based expansion a year, with small expansions that focus on replayability and game mechanics sprinkled throughout.