I have to be honest: many lines of thought that can be read in this thread do not fit for me into the Bauhaus edition. Just as little as the grand piano fits into the 60 sqm living space. Are you sure the concept is set like this? Or do you "just tolerate" it, but would rather have some seclusion everywhere? I am happy to fiddle with sketches a little more, but somehow I don't know where to start. A staircase in the living room is not desired, right?
Personally, I don't follow any philosophy, the architect probably does, and my wife thinks it's nice. I am looking forward to the next draft, but I find your suggestion interesting as such and think that I will ask for a variant in the next conversation where it would work.
Anyhow, wouldn't the area in front of the stairs and towards the guest area be totally dark in your plan? In the current draft, light can come from the stairwell, but like that?