So, now I really have to let my comment out. Much of what I also see has already been said – so I won’t repeat it. The long way from the kitchen to the dining table or to the terrace – well, we have already had that a few times, that someone has planned their fitness studio into the house. If that's how you want it, then go ahead. In times of Corona, when you can't go to the studio anymore, that's certainly an option. Personally, I wouldn't want to have to take a little world tour for every glass of wine in the evening, whether I'm sitting in the living room or on the terrace. Even for a cheese sandwich, that would be too stupid for me. But as I said: everyone has to decide for themselves.
The layout in the bathroom cannot only be optimized, but should be. And that BEFORE you start building, because the plumbing has to be planned accordingly. Otherwise, I think a sauna in the bathroom is great, we have one too. I wouldn’t worry about loungers; the bedroom is next door, so you can easily stretch out there. I would treat myself to a sauna with a view outside; the view there is said to be very beautiful.
I can also fully understand that you don’t want visitors in the personal area on the upper floor. BUT – now the really BIG BUT:
Where should the visitors go? After all, 10 times sleepover guests per year. That is almost once a month. And then the visitors are supposed to sleep on the sofa bed in the living room? You’re not serious???
I wouldn’t want to put myself or the guests through that. Sure, in a small apartment you hardly have any other option – but in a house with >150 sqm? As a host, I wouldn’t want to have to set up and take down the bed in the living room every time my guests stay overnight. And the guest doesn’t have a small personal area where they can hang their pants or pajamas over a chair. No, everything has to be tidied away, because no one wants to display their underwear or pajamas in the living room. YOU’RE NOT SERIOUS, ARE YOU?
In standard houses this is solved by an office on the ground floor: office on all other days, guest room when visitors come. You no longer need the office; you should find another solution; but without a guest room this amount of visitors really doesn’t work.
The desperate cloakroom situation has already been mentioned, as well as the fact that the husband apparently likes to watch TV but the wife rather doesn’t.
Honestly: these are statements the architect needs. In this case, my first thought would be: either carve out a cloakroom where there is a closet for all coats, jackets, hats, scarves, where you can take off your things when you come in, maybe another closet with cleaning equipment and big enough that a guest bed can still fit in there.
Or I carve out a corner of the large living room, which is normally either a TV room for the TV-loving husband with a comfortable sofa that also includes a (good!) bed, or the carved-out room becomes a cozy reading, handicraft or whatever corner for the wife who is not TV-affine, also with the aforementioned good sofa bed. Separate the room with a large double door or sliding door – normally it will probably stand open, but when guests come I can offer my guest an intimate space there. Or I close the door if the husband’s TV program gets on my nerves – not bad either!
In both cases, I grant my guest a minimum of private space and myself as the host the freedom not to have to constantly set up and dismantle the bed.
What makes more sense for you – either the TV corner or the reading room – you can decide. Or whether the solution with the guest/cloakroom pleases you more (when guests come you just really have to use the hooks in the too small entrance area), whatever, but somewhere a corner for the apparently frequent guests definitely still has to be created here!