I know I’m going to mention other games for suggestion.
Would be nice if the MC will have a house to live? Or better yet they can purchase their own home with furniture already in the house. Look at Neverness to Everness, the game offers your own apartment and allows you to designs each room of the apartment. There are other gacha games does offer this type of ideas like recently with HSR having your own room in the train. Though, you don’t purchase them as you will unlocked them later on to the story or increasing your rank to access them.
Anyways, having to able to purchase/owning a house or apartment would be great as it will attracts people that has creativity when it comes to building. It will be much more cooler if the house offers a garage, so you can save your vehicles or maybe spawn inside of them like in every GTA games.
It would also be great if other players can visit your house to look around for how much effort you put into. Though, that would happen if they add multiplayer with more than four players.
I am unsure if adding a furniture shops would be good, but I thought that would add more purpose to explore the whole city. I mean they can just add a menu where you can shop and place them down on your house/apartment.
Did I cook chat?