Floor plan of a single-family house with a gable roof approx. 200 sqm - successful?

Which wall is being divided and how - with buddies via messenger or with a sword strike into two parts ? ? ?

Look at the position of the bed in the children's room and the marital bed ;)

I find your floor plan overall very nice, and especially the master bathroom with the sauna is great! What I really can't imagine with a child is the access to the toilet through the office. If someone is working there in the home office and in the afternoon the child is playing with friends in the garden, everyone has to walk upstairs to quickly use the toilet... preferably with shoes on because it has to be quick :) I would personally also consider a door between the hallway and the living/dining area, because I hate drafts. Maybe plan a bit more storage here and there, otherwise I can well imagine it if no more children are planned.