I think it would be super cool if you could buy characters in the crown shop. Like how some card packs give you characters you can place around your house, but instead you could individually buy characters from the game to place. I really want Belladonna Crisp in my house. Or you could get Malistaire, or Ambrose, or any of them. It would be super cool.
My only concern with that would be: why would be these people be in your house in the first place? And why would there be hundreds of them in hundreds of houses? Maybe if there was some way to explain why, like the version in your house is some kind of fun housing illusion, then yeah I could see it.