Destiny 2: Curse of Osiris Thoughts
I honestly kind of hate Mercury? It's one circular courtyard that serves mostly as an entrance to the one big building, the "infinite forest", which is basically floating beige bricks in a cloudy skybox. It doesn't lean in enough to either its "computer simulation" or "branching timeline" motifs and just feels like a box for aliens to live in.
Destiny 2: Curse of Osiris Thoughts
I don't really think it's worth $20, but I bought the complete version to begin with (like a dummy!) so I didn't have to make that decision. Of course the trouble is that if you want to get into Destiny *now* you pretty much have to buy it if you want to do endgame activities with friends. That's MMO pricing I guess.
TLDR? Just... don't do Destiny
Destiny 2: Curse of Osiris Thoughts
Consequently, all the adventures (and several of the story quests, even) on Mercury basically amount to "go into the forest, travel to the end of the linear path, and do a thing there." Some of the new bosses are neat but ugh, I hate this place as a place.