I come from a family of 7 people, but without any patchwork, and what immediately struck me: the living-dining area somehow feels much narrower than at my parents’ place, although the dimensions are not that different. At my parents’ it is a rectangular room of about 5x12m with a separate kitchen attached. With room-dividing elements, it always became a comfortably large living room (at Christmas, with children who already have partners and possibly additional guests or even grandchildren, there were sometimes as many as 16-17 people, who still all found a place with the help of a chair or beanbag) and a table for a standard 10 people, which could still be extended. I think the shape of your room is not the most practical in connection with the integrated kitchen. What I would absolutely recommend: 2 toilets on the floor where the door you use daily is located. It quickly becomes annoying if everyone wants to leave at the same time or almost at the same time and it gets crowded or you have to change floors. You said you all want to sleep on one level. Why exactly? In your situation, I would rather imagine putting the master bedroom on the living level, for more privacy in both directions and to avoid unnecessary trips at times when you are alone/almost alone. : I think, after 6 years, it’s time for you to throw a house building forum party and present your sense of space live to us, as great as it has always looked in the photos.