Hm, I can't quite understand the thing about the windows. Can you explain in more detail what you mean? With the exception of the west side (which is practically impossible to view from the outside because of the trees), all windows are arranged absolutely symmetrically to each other. That means uniform distances and size grids on the ground floor and upper floor. More windows on the (shady) west side would only be a waste of energy for me. I am not considering aesthetic thoughts about how the house might look from the west side from the outside, if it were possible to view it from that side.
However, I will still give some thought as to whether there is potential for optimization without changing the rooms.
The door to the "Speis" from the office has the underlying idea that one might also want to store folders there or, if one should ever work from home and receive clients, one can offer them a drink directly and without detours. If one comes to the conclusion that the door is not needed, that is absolutely no problem and one simply places a shelf in front of it if the space is needed. Blocking the door is less problematic in my opinion (that’s why it opens into the Speis) than subsequently installing a door if one decides that it is wanted.
The not exactly small area of the building, as I have drawn it, has resulted in a "large" corridor. Although I have also seen 200 m² floor plans with corridors well beyond 20 m² (over 10% of the net floor area!!). Nevertheless, I wanted to keep the corridor as small as possible/necessary. If you have alternative suggestions, feel free to send them — I am always open to new ideas. However, alternatives should not reduce the room sizes or increase the house size (especially the narrow side – width – which is limited).