By the way, I would also have the dimensions in the guest WC clarified again so that a "normal" door fits in there and you are aware of the dimensions of the then required washbasin. The same goes for the utility room, as water supply (multi-utility entry?) is still missing, possibly various downpipes, and the door of the meter cabinet probably cannot be opened like that. In fact, our general contractor drew it in a funny way and during construction we regularly got stuck or had to accept unpleasant compromises. Pipe routes were hardly considered appropriately; it might be better for you but still, I would want to keep an eye on it myself. As the utility room door is now, you would not even be able to have a telephone connection behind it. There is quite a lot of empty space in the middle of the room; so far you probably cannot put a storage shelf, freezer, or similar there. I would probably waive the small window above the sink in the utility room; for example, we have the utility room door like a terrace door with glass. Of course, every floor plan has its challenges, but this is what comes to mind when I look at it. With the sliding door, it is likely to become quite dark in front of the stairs when closed.