The captain's dormers hardly hinder you from dividing the rooms sensibly. So far, the main problem in my opinion is a bit of megalomania (happens to many) and no clear needs analysis.
Are those 12m² in total, or 12m² of living space with additional space under the slope?
Otherwise, I personally found 14m² of living space, plus 1-2m² of floor space under the slopes, quite appropriate so far; bigger is always possible, but this size seems fitting to me..
The space under the slope is only counted half or not at all for good reasons. Because it is only usable to a limited extent. Also, I haven't seen a knee wall yet.
But if I look at the drawing from Hanghaus2023, the guest room on the ground floor has the exact size of a children's room on the upper floor. And that is 12.66m² without a knee wall. That means the 12.66m² upstairs are including the knee wall; according to the living space ordinance, you would rather get about 10.5m²... that is tiny.
Okay, we have now established: everything is rubbish :D now that we know everything we planned wrong, does anyone maybe have concrete suggestions on how to do it better?
So now we have everything from tiny to megalomaniac :D it's not quite easy to extract something productive from all the input.
Okay, we have now established: everything is rubbish :D now that we know what we planned wrong, does anyone perhaps have concrete suggestions on how to do it better? (...)
As long as you don't know what you really need? No. The question of how many children you want must definitely be clarified. Regardless of whether it works out in the end or not.
So now we have everything from tiny to megalomaniac :D it's not easy to derive something productive from all the input.
I don't see any contradictions. The children's rooms are rather too small, the dressing room absurdly large. The question will be what you can afford and that will depend on the development.