Good mobile game = ports from PC games and emulators
miHoYo games could be so much more if they are PC/Console games instead of mobile.
The only truly mobile game that I can think of that I can say is good is Pokemon GO, and I don't even like it but is the only game that truly uses the uniqueness of the mobile platform as a game feature.
I'm in a closed beta for WalkScape, which is a single-player RPG that uses your pedometer for all game progress. Travel to another location? Chop down trees? Craft a bronze mining pick? Stomp grapes into wine? All of them progress only as you take steps throughout the day. A great little game to check in on now and then, and I feel utilizes the mobile platform well.
It's neat, if fairly barebones. You pop open the game, see if you've completed your current activity (reached a destination you walked to, finished crafting through your item stack, gathered materials until your bag is full) then designate the next thing you'll do. But, it's F2P, ad-free, and the devs are very genuine! There's another beta wave soon because they're showing it at Gamescom! https://walkscape.app
Also, it's more forgiving than POGO since it uses STRICTLY pedometer (step count), so it doesn't try to see if you were running too fast, changing location, etc.
The last levels of Abyss is more about team comp + good items than what you can do with the combat.
Of course you need to dodge and switch characters efficiently but the ceiling of the game is low. You have some interesting things like the 2H characters jumping + attack but is not like a essential skill of the game.