I really like it. That is exactly my taste. I once had a house that had such a cubature, just not as stylish (built in '78).
How wide is the living/dining area? What is the studio used for? What is in the middle of the living-dining area?
Is the entrance area sufficient for your wardrobe? There is no closet drawn in there.
The furnishing is now from the architect. I advise everyone to draw in their own furniture ideas in a design. To scale, then you immediately deal with the dimensions of the house and get a better feel.
Did you fill out the questionnaire back then?
The kitchen units would benefit from a strip window – for that, knowledge about tall cabinets is needed.
Personally, I prefer it if the chill area is a bit more hidden, so I tend to switch kitchen/living.
For the children's bathroom, I would replace the shower with a bathtub (it's very easy to shower in a bathtub).
Construction costs
Even if we should build smaller (I’m happy about every saved cent).
For us without measurements, it is naturally hard to tell where there might be projections that could possibly be removed. Spontaneously, I would have suggested planning the bay window corner outward so that one of the children's rooms benefits from more space.
Windows up to the gable look really great, as does the minimalist construction style. Maybe one can backtrack a little there.
19 sqm bedroom plus balcony.. 17 sqm children's room plus balcony.. All rooms upstairs with around 13-14 sqm each would be sufficient. Balconies are not really necessary, they just look good.
On the ground floor, 42 sqm plus kitchen.. some houses manage with a total of 40 sqm there. So, there are approaches to building smaller and saving if necessary. And even then, the design would certainly have its special appeal.