I'd like to suggest some "new" decoration blocks:
The Relic crown, Relic vase, Relic band, Relic statue and the Strange Souvenir would make some fantastic interiors decoration in my opinion.
An interesting addition would also be to make the Flabebe flowers and Valuable mushrooms plantable in pots, they are perfect to give more color to your home.
I'd like to suggest some "new" decoration blocks: The Relic crown, Relic vase, Relic band, Relic statue and the Strange Souvenir would make some fantastic interiors decoration in my opinion.
An interesting addition would also be to make the Flabebe flowers and Valuable mushrooms plantable in pots, they are perfect to give more color to your home.