i like the idea of having more control over the interior and exterior of villager houses, but as @whitbit mentioned, i'd like my villagers to be able to express their own style too. it was frustrating in NL when villagers displayed a piece of furniture or clothing that didn't match their theme and i had limited control over that aspect.
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basically i wouldn't mind starting from scratch but it would be nice to not completely start from scratch (bare house in the beginning but gradually unlock pre-determined furniture). i'd still have control over adding, changing or moving things around though for the sake of villagers' individual style.