Regarding the wardrobe: It is mainly for guests - our jackets and shoes are supposed to go into the storage room. This can be reached quickly from the driveway with groceries, but for the open-plan kitchen the house side would be too dark, right?
You are planning for 6 people plus guests.
For that, the (main) solution in the storage room is not practical, also considering the reality of living with children. Additionally, because of the rather small kitchen, you need a corresponding storage room, then there are also prams and strollers to consider, so you don’t even have to think about the grandparents’ rollator anymore.
The placement of the open-plan kitchen has nothing to do with this at first, it is about the question of where to best place each room taking into account the wishes of the builders and the property.
Regarding kitchen size: Should we reduce the ground floor office even more or where would you take the space from?
There is enough space for that, you should integrate the kitchen planning into the planning as soon as possible.
Bathrooms: Wouldn’t one bathroom per floor be enough? In the attic there will also be pipes, so that we can open a fourth bathroom if necessary. What would be your suggestion?
There are more practical solutions, e.g., separating the toilet from the bathroom, and putting washbasins in the children's rooms.
Living room
… with blinkers is not nice unless you would plan it like this even without necessity.
Laundry: The shaft goes close to the washing machine... what would be better here?
And then someone will have to carry all the laundry back up again.
Overall, your planning is not bad, but also not really practical.
Regards
WD