I don't like the sprite dimensions used. I think it makes it clear that we are playing with sprites. You may want to take some example from some of the best Sprite RPGs, the pace inside a house is just bare enough to hold the characters interacting. If you need it to be larger, you must make different rooms. Usually the room should not be large enough to keep more than five characters in it.
I hope the artist take some notice of my proportion suggestions, as I think he is doing a good job with dialogue and voice acting.
I recommend you give this a shot.