Just about the rooms..
The pantry access steals good wall space for tall cabinets from the already quite small kitchen because of the passage. This means that the kitchen on the 6m stretch is already planned well over the 3m limit, leaving just about 250 cm for the dining table.
Therefore, I would integrate the pantry into the utility room and basically extend the wall with the door to the utility room as a partition wall to the kitchen.
I also find the guest room with the loophole windows creepy. I would put proper windows there, possibly in the living room instead of the two floor-to-ceiling windows with the sofa in front, also only windows with a normal sill height.
Guest WC.. with barely 190 cm width you have to plan carefully whether the toilet and sink fit well opposite each other. Possibly a design with a shower in front of the window, which could then remain a loophole. Although I don’t yet necessarily see that as the better solution.
The bathroom upstairs is somehow awkwardly shaped. There are almost 5 sqm that are unusable.
The staircase is sufficiently long :cool: .. but I think the overlap must be checked exactly .. see cross-section:
The man on the stairs is 209 cm tall at that spot .. one step earlier it is less, and when you push off from the step before to go downstairs, it gets tight for the head for people from about 180 cm height onwards.
In general, with the knee wall height and the opening direction of the bedroom door, the opening must be limited to 90°, otherwise, the door always ends up in the roof slope.
Why only a knee wall of 180 cm?