Have you ever considered, in case X, accessing a second dwelling unit from the outside? A staircase that ends in a balcony?
The 2 entrances and the stairwell take up a lot of space that you lack in the living area. The wardrobe has 1.5 sqm hallway even if it is not declared as such.
You have many small, almost too small, living areas on the ground floor that are grouped around the hallway and the unfurnished freedom (somehow I like this expression).
Really draw all the furniture to scale and take into account the necessary movement space.