Otherwise I'm a bit less critical than you guys.
The issue I have isn't that the designs are awful or anything, but there is just nothing that excites me out of that lineup outside of a few that are just "pretty good". That lineup represents the better part of a
year of characters though, and a whole nation of stories, interactions, getting invested in them etc. I don't feel like any live service game should have your reaction of a year of content to be "eh, it's ok", much less one as profitable and big as Genshin. We're at a stage that there should absolutely be something for everyone instead of these middling designs that seem to be built to just not offend anyone. I'm ok with garter twink as long as there's a Candace to balance it out, but there's not. I'm ok with a covered female if we also get a male that an actual male would want to play, like Alhaitham. That kind of thing. The balance seems to be shifting quite a bit to pander to women though. Maybe they see a growing metric on female players and want to expand that, who knows.
The only things holding back my disappointment is that these 2D arrow poses don't translate 1:1 with the 3D models, so there's a chance that they look better in 3D, and there's the hopium that maybe some of the designs will improve before release. The Bloodborne girl supposedly has had 3 completely different color iterations so far according to leakers, so lots of things can change between now and release. Then again, they can also get a lot worse before release too.