Update:
- new architect
Scale 1:100 ...should be about 180sqm.
Wow! Just added 30sqm on top - that's a big deal! And if you straighten out the kitchen, it's probably 40. I would still be interested in the external dimensions.
Regarding the design:
Bigger is supposedly often easier. But when you look closely, you see that actually only space is wasted and hardly any sensible space has been created.
For 6 people, I first of all need a proper cloakroom. There should be at least 3m of closet with 60cm depth. I can't find anything suitable there.
I would give the shower on the ground floor a bit more space. If the parents really move downstairs, you still want to be able to comfortably get undressed and dressed in the small bathroom. For that, I would also place a bed and a closet in the guest room to see if they fit with this room shape.
In my opinion, the living room is on the borderline of being "uncomfortably large". Measurements would help to better assess that.
The upper floor seems amateurish to me. I don't even know what to criticize first.
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