Somehow the staircase there feels like a foreign body to me. A spacious entrance is nice, but here it is rather cramped, and I miss the matching spaciousness in the living area. Therefore, I would rather allocate the space consumption at the entrance to the living area. Maybe you should also question the often discussed square floor plan here for your purposes/wishes. I don't like the proportions between entrance/kitchen/living that much; so far, the floor plan seems to me more indifferent than tailored to your wishes (which I do not know in detail), definitely much more is possible.
On the ground floor, I would give the guest WC a small shower; at the latest when the kids get older, they will appreciate it (e.g., partially use the space of the entrance for this). The bathroom upstairs could also yield about 2 sqm and can still be a nice bathroom; size alone does not have much value there either. The current plan with the door swinging into the shower area is not nice, and the position of the WC is also not ideal. The children's rooms are quite large, but even there, measured against other room sizes, maybe 2 sqm less each would be enough for storage space or a dressing/closet area. In the basement, you have three larger rooms, which is a luxury missing upstairs; perhaps you could also relocate bedrooms there, simply to gain more free space on the ground floor. If I were you, I would also try a rather rectangular floor plan once; you can find thousands of those on the internet. Windows? I am currently sitting in our half-finished "glass box" but looking outside through large windows into the greenery, we love it.
You must not tell that to a Polish wife. She wouldn't let anyone in if the kitchen is not tidy or lockable
Nanana.....could it sometimes be that the egg comes before the chicken? :D. But it is actually true that you should pay much more attention to your own habits and wishes; there is no right or wrong here either. Therefore, I always enjoy seeing other lifestyles and habits, even if some sound funny to me at times. The variety is what is beautiful, which is why I keep pointing out that one should find their own way instead of aligning too much with the rather uniform thinking and living of other builders. For example, from the basic idea, we always have an open living concept and like large windows; friends come without appointment. An activity that seems hectic to me when guests arrive immediately takes away my joy; I would also easily go to bed and could let the guests continue celebrating alone. Therefore, such visits never stress me out.