Final stage floor plan: Is there still potential here?

In the gables, for example, desks/computer tables can be placed, and it might be possible to put a wardrobe against the now full-fledged wall in the room with the full gable width. It would also be possible to place a couch there, which with the sloping roof does not reach all the way to the wall. My girlfriend, for example, always sat on the bed to do her homework. That would only be possible to a limited extent with our sloping roofs. I personally like it very much when planning is done so that all rooms have at least two furnishing options.

I believe you are overestimating the dormers. If you put something in the dormers, you can no longer access their windows. I am rather skeptical about that, my niece has such dormers in the children's room and you cannot place anything underneath, in front of, or beside them without blocking something.

The program is Architekt 3d Professional but I wouldn't actually recommend it.

I have to give some praise here. What Katja offers with her floor plan ideas in terms of support is really great. Not only in this thread but in general. So a big compliment from me, Katja. You have really improved many floor plans a lot.

Best regards, Manuel

We actually want to avoid having a wardrobe in the bedroom as much as possible.

Then the wall between the bedroom and bathroom could be moved in favor of the bathroom if necessary.

I just came across the term "two full stories" in the initial thread about the development plan.
Does it have to be or can it be? The house is not a two-story building, you know that yourself.

Then I don't know if your stair planning is that common. Intermediate landings change the gait, which is not practical but can be dangerous. You should get informed about that, especially in combination with a change of direction.
In the living room, I would place the sofa against the exterior wall and install a floor-to-ceiling window facing north or east.

Basically, I would remix the ground floor if your wife also likes to read in the sunlight.
Of course, for other reasons too. Katja has nicely conjured up the upper floor [emoji4]
I also don't find the dormer at the edge of the roof that great.

And another note about the knee wall: 60/70 cm is not much. You can't squeeze a bed with a headboard in there... the children can't move around underneath either if there's a bed with a lying surface about 40 cm high.
I know it like this: if a knee wall is under about 100 cm, you build forward inside the rooms. That makes the floor and usable area smaller but gives a higher knee wall inside.
There were already enough comments about the bottleneck in the dressing room...

P.s. I would combine the dressing room and bedroom and fully close off the area under the slope with sliding doors. Then you will have enough space behind for shelves and clothes rails. A seating area can be created in the dormer.