Sorry, but it has nothing to do with "not so important." We like the straight staircase, but it is not a must. However, I also played around with other staircases, and there wasn’t much change. Maybe I took the wrong measurements. The space under the stairs would not remain unused. You can put something there and also install cabinets.
As I said, I am not against suggestions, otherwise I wouldn’t have posted here. I’d rather someone tell me what is not so good before everyone says it’s great and in the end it isn’t. I don’t find the living/dining/kitchen area of about 51 sqm too small now. Bigger is of course always possible, especially in the living room I would like the wall to be a bit longer.
Not bad your idea, I know what you’re getting at. But on the first glance upstairs, the room to the left of the stairs seems quite narrow to me. Of course, that could be misleading due to the sketch. Although it might still be enough for an office.