Now, from what i see and some others might see, most npcs are original, most assets too. But as of late, especally some new content as crystals slugs, the environments and room itself seem to be made with rpg maker assets.
What i suggest is every rpg maker asset to be instead remade by one of the nin artists, or just ingeneral replaced, because having rpg maker stuff in a mmorpg usually suggest said game is low quality, or not worth checkinng out (many people who play with rpg maker likes know that usually if there is generic/basic assets of it = creator is new, or cannot make their own assets. This is not against the owner or how environments look because imo even though i can see some of them are rpg maker ones, they look like what they are trying to suggest to the player as environments)