[PVE sky arena challenge]

Have you considered increasing the gameplay of pve? Similar to the sky arena, maybe each floor can have different challenges, such as fake pve player enemies, fighting 2-3 boss-level monsters at a time, a large number of mobs, solving puzzles, etc. , may make it more interesting for pve-loving players.

[I'm a healer but at some point I have to be forced to be a beater]

I'm a healer, but I have to force attacks on certain occasions or I don't get paid. That advocacy violated my work as a therapist. Maybe some field boss reward mechanisms can be added, so that the player who heals the most and suffers the most damage can also get rewards? ?

[Pokémon-like PVE casual mini-game concept]

I found that on the map you can find some small monsters, small animals and other creatures, maybe you can make some interesting systems for them, similar to Pokémon, you can grab, collect and even fight. This may be a good idea for casual players. Very attractive, I think this concept will add some new pets as a way to attract players when adding new areas or new activities in the future.

[Great background work, but something seems to be missing]

I found that your background production is very careful. Some rooms have silhouette effects, or dogs are eating food, or NPCs are drinking and talking, etc.
But you don't have events that can support this detail and allow players to appreciate these tiny designs in the game, such as allowing players to solve some small tasks that can interact with npc

[New toy items: ones that can be used on players, or some useless little pets or something...]

Hope to create some toys that don't break the balance of the game, such as
Toy car: put it on the ground and it will move
Football: You can kick each other with other players
Small pets: follow you, useless except cute