most probably it wasn't in the game because of copyright issue. i did heard something about some other game has created the housing system and make some sort of copyright for it. therefore other game developer can't do the same thing. not sure if this is true or not.
i would like to decorate my house with some flowers in it. a sofa , maybe a bedroom and oohhh..toilet as well. kitchen, living room , dining room , study room and a wardrobe. ohh and a garden look nice too. XD
ohhh..and also room for partner and pets as well. and can invite friends, party member into the house ......
Not really how copyright works, you're thinking of patents there.
Copyright only protects creative expressions of something, not something that's functional.
I.E. A cake recipe can't be protected by copyright, but the life story of the author and the pictures of the cake can be.
Other games have done it in the past as well, like Dragon's Prophet, Black Desert Online, MapleStory 2, etc.
So It likely isn't a copyright issue.
From my knowledge it was a planned feature as well at one point, but dropped, likely because player housing is just something that's really complex to build. From a technical standpoint.
