So, for example, with a grand piano we also have an item that we need to place somewhere. And the bottom left corner of the living room fits quite well. A bit shadier and with a view of the garden.
Maybe this sounds a bit pretentious, but a grand piano is not just any item, nor is it a Bontempi organ that you just place against an available wall. It practically demands the right to be consciously and appropriately positioned. Where you suggest, it would have a view of the garden but you would be sitting cramped in the corner, right in front of the dining table. A "normal" grand piano already measures about 160x160 cm, without the bench and free space around it. But it would have the advantage that when guests come, you could also put hot dumplings or the beer keg there.
I think you urgently need to actually draw in the furniture dimensions (especially for the grand piano) etc. I am currently sitting in a room about 60 sqm and am imagining this. The back of the sofa almost touches the chair on the other side.
I don't know if this rectangular open-plan room without any offsets still feels spacious, which it actually should. If this or something similar will be your furnishing, the living room/dining table will feel cramped; furthermore, I would also like to have the entrance to the central dining table mediated.
Separating off the kitchen is your desire, but in this case it would feel too separated for me and practically only accessible through this bottleneck with a door. At this point, the spaciousness is suddenly lost because of this passage. Why not make the kitchen bigger and together with the dining table (then you’d have separation of cooking/eating from living) and the currently large open-plan room maybe less big and then only for living, reading, music……?
The house entrance area feels cramped, it also lacks spaciousness, probably because of the staircase, but there is "dead" space for the continuing corridor. If you opened "work" from the open-plan room the dreadful corridor would go away, the bathroom etc. would be larger and you would have an offset for the sofa or grand piano etc.
Much has already been said about the upper floor especially, as on the ground floor, about the corridor issue and the passage through the dressing room to the bedroom. If the dressing room was a nicely furnished, bright room then yes, but as it is not. The bathroom is not really nice as is, but you wanted to change the WC anyway; in this position, in front of the tub, it doesn’t fit in my opinion. I would swap bedroom and bathroom the same way and give both rooms more space, because here too, spaciousness suddenly disappears.
I definitely like such a building, the living room is huge in terms of area with great windows, but otherwise this spaciousness does not show in some places or suddenly disappears, which I would find unfortunate.
I also do not particularly like the image of the garage placed directly in front of the house as such a dominant block, but maybe it cannot be done otherwise.
You are 3 people, maybe sometimes four and rarely have guests staying overnight. You have expensively built space in a labyrinthine building that simply does not reflect spaciousness. I read that the furniture has not really been taken into account yet, a grand piano is somewhere still standing etc. and it comes across to me as if it is just built and then "we'll see if it can be used"; it’s big enough after all. I miss your very specific, life-tailored floor plan. In the house you wander or look for yourself, I find it simply not fluid for a family of three, although I really like spaciousness. We currently live as two people in 200 sqm and it is not too big for us, but the respective proportions or your very personal, desired usability of the rooms has to be reflected in it. Does it really?