as someone who stuck with genshin, there have also been a lot of issues with the writing in natlan. sumeru and fontaine (the last two regions) had really good storylines, but also the characters were great. though fontaine did have a random banner with a character that is so forgettable it's unreal I genuinely forget she exists. but that's whatever man.
anyway back to the point, natlan, the current region has had pretty boring ass writing and the most boring archon who has no flaws and is perfect. and then to top it all off it has the whitest characters in a region based on areas of the world with populations of people who are not white. oh but there are like, what, two slightly tan characters? yeah. there are actually a lot of darker npcs, at least, but. that's all they are. npcs. like it's an improvement over sumeru also being extremely pale except for only like two npcs. like where are the playable characters that aren't just slightly tan? oh right, because the main fanbase is racist af and will riot over it. (the hoyo app, hoyolab is full of racists throwing tantrums over posts where artists redesign the characters to have darker skintones. it's ridiculous. hoyo doesn't do jackshit about it.)
but yeah the characters in sumeru and fontaine had a lot of depth, but the ones in natlan are pretty flat and it's disappointing. the one character that was actually interesting? yeah they decided to kill him off instead of making him a playable character. (there are debates in the fandom as to whether he's actually fully dead like he'll get released later but for now I'm going to assume he's Dead dead because of the focus hoyo has had on pushing out female characters.)
honestly, i feel like the game has been gradually declining since natlan. i’ve played up until the end of fontaine and called quits because of the lack of diversity in natlan even before it released. i’ve seen a lot of the fanbase and their racism while another side of genshin’s fanbase is a stark difference with trying to call for diversity, which didn’t really do much unfortunately.
for wuwa and it’s latest region with rinascita, i feel so much more immersed in the story, characters, and nation because of how diverse it feels from the previous nation. and seeing as to how its game devs have been taking in feedback and actually implementing it in the game, i hope they see the failure with how genshin has shown “diversity” with their nations and improve upon that.