I wouldn't know how to get into the guest room or utility room. The circulation area is already needed there. The bathroom is also supposed to be used for laundry. But it is indeed a bit too big. We don't need a dressing room. It should mostly fit into the bedroom. That is almost completely without sloping ceilings. Although I will probably move the door here. The kitchen would then have to be coordinated with the kitchen planner.
The floor plan is flexible – that means there are certainly houses where you can manage that without problems. Circulation space is dead space that you pay for expensively. We fit more into 150sqm than you do in your currently designed 180sqm... You just have to think a bit (or have someone think for you, keyword architect). You plan the kitchen according to the floor plan – interesting! We had an idea of a kitchen (for example, we didn't want any corners anymore) and then planned the room accordingly. Both approaches are legitimate. By the way, we are planning about 450,000 euros for the house at 150sqm – we will now adjust our planning to 230,000 euros, which corresponds to your price per sqm of about 1550 euros. I think that's good. I then took the remaining 220,000 euros and ordered a Lambo (*lol*)