So, I went through the thread here: North is top left, right?
That means: on the ground floor, the cloakroom and guest WC got the premium side of the house. I mean, taking a dump in a nice setting has something to it, but you can overdo it....
I would do without one thing: direct access from the garage to the pantry. That's nice if it fits, but here you’re limiting yourselves.
Then the kitchen can move over to the south side, the office/guest room stays, the terrace from west to southwest, and that way the kitchen has terrace access AND is on the street side.
Children’s rooms on the south side, utility room to the northwest, there you can make an exit onto the garage roof and possibly green it to use it for putting out the drying rack. Bedroom, dressing room, and bathroom can stay as they are.
I’ll roughly sketch that as an idea, in my first idea that works with a half-landing staircase, or would it also be an option for you to have access to the upper floor from the living area?
Then you could separate the office area from the living room with a straight staircase, you had the idea that the office area should belong more to the living area. That would fit quite well.
I’d be happy to roughly sketch the room concept once with a straight staircase, once with a half-landing staircase. However, the downside here is that you can no longer get from the garage to the pantry. That was always my wish too, but I think you can live without it quite well.