So far, so good! I understand that now. The living room should not be a thoroughfare, so you would swap the kitchen and the living room. Then the living room moves to the "end" and simply becomes cozy! Additionally, a short walking distance between the kitchen and the terrace is created. Sounds like a very good idea! You always read kitchen in the east, living/dining in the south/west, which is why I was a bit stuck there.
Then I would try to make those over 50 sqm usable and not misuse the big room downstairs as a storage room. Rather, prefer to stage the utility room upstairs with laundry space.
What exactly you mean by this is unfortunately not clear to me yet... You would extend the technical room upstairs and try to accommodate the laundry space there? Then downstairs, for example, only set up a guest room in the room, because the location of the room (big room?) is too good to make it a "storage room"? Did I interpret that correctly?
----
Now I looked at the floor plan again. Swapping the kitchen and the living room is not that easy for me. The kitchen would then move upwards next to the toilet. There is no real corner there to accommodate the kitchen, is there, or how would you solve that? Also, I wanted to include a shower in the toilet, which would further reduce the space for the guest room. Difficult! Maybe someone would like to quickly sketch something, I find that so difficult...
Best regards