Honestly if you approach genshins probabilities for 5* with anything other than “50% i get at max pity, 100% at 2x max pity” you’re doing it wrong so I’d argue in that sense it’s dead simple. 4* being less guaranteed feels like a problem though, you’re not that much more likely to get the 4* you want from a banner than the 5*, and there’s no guarantee you’ll ever get it at all. And ime a LOT of people don’t realize that (though I still don’t think getting a rough idea of that is particularly complicated).

Having outright “if you spend x in game currency, you are x% likely to get the thing you want” info does seem like a reasonable requirement.

And personally the reason i spent more on genshin than any other gacha is that i had a reasonably priced guarantee instead of having to gamble at all, it felt more like buying chars for a set price with bonus loot boxes.

I thought they did that at the start of the year

I played it on a pc that was ok at the time and the physics engine glitched out so things that were supposed to be sitting still on top of/next to each other would randomly collide and sometimes fly off. Still had fun with the game though.