If there is enough space, I would at least provide a shower on the ground floor, since eventually the child will become a teenager and might live in the study. Upstairs, I don't see a window that could give the hallway nice daylight. The discussed area around the open space, that is dining/living, feels inappropriate to me. Surely not every centimeter has to be meaningful, but I find defined zones/areas pleasant. You could never use this room otherwise, since it is a leftover space and doesn't seem to have been consciously created that way. Otherwise, everything looks nice. You may like the open space in this size or not, but recently I saw something similar where they had nicely designed this area upstairs as an open space with windows, armchairs..., next to the living room another "communication/chill corner" for bean bags, TV, reading, relaxing...