Another idea I’d like to see in the future for the exterior is the ability to change the “flooring” of the ground outside, similar to how you can change the carpet/floor inside, or how you could change the ground type on Island Sanctuary independently of the building styles.

But in the meantime, I hope (but not really expect) that exteriors would get at least 5-10 more item slots when they raise the interior limits. From everything I’ve seen, it seems like they were very careful to specify interior on that though.