Thank you very much for your feedback!
We are currently considering going back to an old version of the plan for the attic, where there is no shower in the attic, but "only" a toilet, which would make the two rooms significantly larger. If we ever need two showers at the same time, someone would just have to go down to the basement.
We did not intend to separate guest room and office, that might have been phrased misleadingly.
Do you think the bay window is too narrow inside to fit the dining table with chairs?
The floor-to-ceiling window in the bathroom and the light wells are still placeholders, they will be corrected in the new plan.
One more question: Bathrooms stacked on top of each other for short pipes makes sense to me, but is this primarily a financial issue, or do long pipes also have practical disadvantages that should be considered?
: Thank you for the floor plans! In "our" attic, the northern dormer is unfortunately only 2.7m wide, unfortunately too narrow to place the bed like you did, but we are reconsidering whether we can arrange it differently and want to plan the children's rooms on the upper floor.
What did YPG mean by storage space for slanted rooms?