Opinion on bathroom planning

Is the upper floor a full storey without or with a slope? And if the latter: how high is the knee wall, and is the shower in a third gable? How high is the knee wall here? I find the upper floor absolutely unplanned and thoughtless. Who planned this?

The upper floor is a full story without slopes, gables, or knee walls. Why do you think the upper floor is ill-considered? I planned it under the condition that a separate study room is needed and that after leaving the bedroom, one goes into the dressing room, so the bedroom does not have to be entered again and the bathroom is not accessed from the bedroom via the hallway.

Why do you think the upper floor is not well thought out.

Honestly:
In your planning, you just placed the windows arbitrarily by feel, without any real symmetry (just a guessed rough estimate, but measured ;) )
The doors are also not planned, but just placed where a layman thinks they are good ;)
This also applies to the ground floor.

Your 5 desks might fit on the upper floor according to your drawing, but the study then only has a depth of 60 cm? Or the closet with desk – you can’t be serious?!?
The walk-in closet can barely swallow 3 meters of wardrobe, but you have a separate shower with a 70 cm entrance in an over 13 sqm bathroom.

You are building with a general contractor, and he lets you have free rein?

The windows are not yet symmetrical, but in the children's rooms the arrangement of the windows is flexible enough that symmetry can be established at the last step at any time.

How would you improve the arrangement of the doors? The desk tabletops have a depth of 75 cm. The desk in the storage room was drawn in so that the width of the storage room is measured to fit a desk. Of course, it should not be used as a study.

What do you think, how many meters of wardrobe are usually needed in the dressing room or would additional dressers in the bedroom be sufficient?

How would you arrange the bathroom better? Place the separate shower in the room? Unfortunately, the laundry chute is not 100% flexible and should be located in the upper right area of the room.

Yes, we are building with a general contractor who adopts our idea.

I have to agree with ypg there. In the upper floor, there would be too many narrow spots for my taste. When going in and out of the bathroom into the hallway, no one should come towards you, the hallway is already narrow enough as it is. The access from the hallway to the bedroom is just barely doable at 1 meter, as long as no one is coming from the study. Why the corner in the study? If it makes no sense/reason, then put the door on the other side and eliminate the corner. A 44 cm passage from the desk to the planned closet is also too narrow.
Coming out of the bathroom, you have to be careful that no one comes out of the storage room and hits you with the door. Access to the shower with 72 cm is not acceptable in such a large bathroom. I would get claustrophobic in the shower and the corner would also be dark, or you should install a light in the shower niche.
12.6 sqm of hallway space and still so many narrow spots won’t work, you will regret it in a few years. Not to mention the wasted space. Plan a different staircase into the house to gain more space!

Edit: I am not planning a dressing room when I already plan the option to have enough space in the bedroom for additional dressers. Either a dressing room with enough space for the current cabinet needs plus reserve space or not at all.

Edit 2:
If you absolutely want to keep this niche, for whatever reason, then rather put the toilet there, the laundry chute in the top right corner, bathtub under the window (you can look at the stars while bathing, but that depends on taste), shower where the bathtub is now. If the niche can be removed, then don’t put the toilet in the niche, but where the towel holder is now.
(Just a quick thought)

Thank you for the response. The issue with the bottlenecks is a valid argument, but we assumed that the area 1mx1m in front of the bathroom would be considered too narrow, especially since the rest of the hallway is rather open. The corner in the study only came about because this way there would be more study space and less hallway. Since the passage does not have to match the full width of the bedroom door. Since I hardly use this desk, I consider 44cm to be sufficient. Since it is a storage room, I assume it rarely happens that someone closes the door behind them and spends a longer time inside. We have already seen this 70cm access to the shower and it was sufficient for us. With the right lighting, you have a nice shower cabin without glass walls and larger areas of the bathroom are not sprayed wet. Of course, it is not suitable for wheelchairs. Another staircase would be nice, since the house is planned around the staircase. But a double-helix concrete staircase would not be much smaller and would appear as a massive block on the ground floor. What alternatives regarding concrete staircases would there still be? The cabinets with 300x66x236 are sufficient for our current needs. Either you give up reserve space or create a corner in the bedroom to gain space for the dressing room.