I have mixed feelings about this expansion. I feel like I need to mention I never played D1 (so the copied assets from D1 dont really "affect" me).

The campaign, or better the introduction story was pretty amazing and I was hooked for the absolute most part. However, there were way too many copied bosses even from D2. It was also way too short, and needed some more important quests, not only fetched/grindy quests. The ending of the campaign was also pretty bad - I see the need for cliff hangers, but it needs to feel like a whole section and not just cut off without any ending scene.

The season of the undying is also pretty small. I like the vex offensive and how rewarding it is (thanks Bungie for actually giving us stuff). But its really only one game mode (compare this to the black armory, drifter or calus, where we got at least 2 with tons of different weapons).

In general, I like the feeling of the ongoing/living world.

The new moon weapons are pretty great, but the way to obtain them is beyond boring and some of them literally take ages.