I think the ground floor is quite good. For me, it would be a bit too open. I might plan a glass door between the hallway and the living area so that wind does not blow straight through the whole house when you open the front door. And also so that not all noise from the ground floor passes unhindered into the upper floor. For this reason as well, I would leave out the air space. I think I will never really understand the purpose of such an air space. The steam and smell from the kitchen go directly upstairs. Instead of the air space, you could also set up the second office or guest room upstairs. The dressing room could maybe be rotated by 90 degrees. The room behind it could then be used as storage space, accessible from the office. As it is now, I don’t really find the dressing room practical.