+1 for Genshin. While I think your gacha warning is excellent I do want to point out that the amount of resources you get for getting characters is more than enough to clear all story content. Hell if you're a good player you could probably clear the whole game without using a single primogem, not even the countless thousands you get along the way.

And massive is also the understatement of the year. There is voiced content here that dwarfs even whole trilogies. I wouldn't be surprised if there are more recorded lines than all of Dragon Age and Mass Effect put together. And the story is likely not even at the halfway point yet, there's still years to go. Closest analogy would probably be SWTOR, the MMO, but with much better combat.