Floor plan 200m² single-family house, raised ground floor, existing plot, double garage

In the attic parents' room, I would plan the bed further down the floor plan and thus consider a higher and further down the floor plan knee wall.

Exactly, a nice high knee wall, behind which you can also create additional storage space, at least built-in shelves or similar.

Sure, I understand shower and dirt all through the house, but isn’t there more space for the second bathroom in the attic than on the ground floor or am I mistaken again?

You know, some things can’t be seen wrong, only individually. I understood that you want to remove the room entirely.
Regarding individuality, where a shower makes more sense now: it might be that you still have a dog wish after moving in – in that case, a shower on the ground floor could be advantageous. Otherwise, I agree with you.

Why is the dining/kitchen area too small?

She doesn’t say that; she criticizes the width.

I would rethink the kitchen/dining area, which is only 581 cm, and move the wall towards the living area further.

Between kitchen rows, when planning a captive work surface, allow 100–120 cm. The kitchen island is definitely too narrow. With a stove on it, it must be at least 90 cm deep, otherwise grease splashes onto the floor on the other side. Also, things tend to fall off at 60 cm depth. Summed up, that makes 2.50 to 2.70 m.
Table with chairs best at least 3.00 meters, better 3.50, so you can still walk around when the table is occupied.

...the pantry actually serves as storage space.

Phew, do you really need over 5 linear meters of cabinets for food? If you plan two base cabinets with countertop and have a toaster or kitchen machine there, the storage space* next to it is still enough, but you might also want to bake your bread in daylight or work with the kitchen machine.
*I would rather allocate one side of the pantry cabinets to the wardrobe because it has no deep cabinets, so you can’t put anything on hangers. The pantry can easily handle 30 cm cabinets, clothing cannot.

Is there actually an average elevation? What is the roof pitch?

Huh? Please don’t let yourselves be fooled.
Yes, of course the shower needs the height space so that you can even set it up. But you can just measure the height of your current shower, then you’ll know how much is needed.

We’ve already been fooled by him the whole time. Because of the “sunk-cost fallacy” I wanted to go through with the draft plan, but somehow it’s not getting any better.
In summary, what I would take from your once again constructive contribution:
Ground floor shower gone, we agree on that!
Staircase landing gone and reduce space consumption. We found a landing staircase practical and he said, it fits easily......
Built-in closets gone, reverse the stair ascent.
Pull the knee wall (is that the wall recess to the actual exterior wall, right?) significantly further in so that you can also stand up.
Washing machine was on the ground floor, since we said WM is fine if it relaxes the upper floor.
The thing with the doors is due to the chimney and because he said the load-bearing walls must be on top of each other and that is the best solution for that.
I don’t like the attic at all yet. What I did like was the bathroom in the corner, because then we don’t have to lay a waste pipe somewhere but both bathrooms would be stacked. But otherwise way too big and I don’t want to sit under the toilet with the slope.

No, nothing faithful. We only said we would like to have a small wood stove for the atmosphere since we get free wood through my cousin. Nothing has been chosen at all.

I could endure frosted glass because the closet itself is dark and you can hardly see in, but I would like a small shallow window up high, but that’s certainly not a must.

I actually wanted the entire ground floor without its own controls since it should be equally warm everywhere there, but cooling should definitely be available.

The landing is not mine either, but he said some weather protection is mandatory because we stand directly in the house as soon as we open the door.

Between the kitchen units, one plans 100-120 cm for a trapped work surface. An island is definitely too narrow. With a stove on it, it has to be at least 90 cm deep, otherwise the grease splashes onto the floor on the other side. Also, with 60 cm things tend to fall down easily. That adds up to 2.50 to 2.70 m.
Table with chairs preferably at least 3.00 meters, better 3.50, so you can still walk around when the table is full.

Phew, do you really need over 5 running meters of cabinets for food? If you plan 2 base cabinets with countertop and have a toaster or food processor there, then the storage space* next to that is still enough, but I might also want to bake my bread or work with the food processor in daylight.
*I would rather assign one cabinet side of the pantry to the wardrobe as this one has .no. deep cabinets, so you can’t store anything on a coat hanger. The pantry can easily and well handle 30 cm cabinets, clothing cannot.

Thanks for both hints. The dimensions sound exactly like what I’ve been looking for a long time and no one could tell me.... So 2.70 + 3.50 = 6.30 m width for the living/dining area would be ideal or do I have to plan a buffer somewhere?

Is there actually a height section? What is the roof pitch?

He oriented himself on the existing house with 32°, if I remember correctly. He didn’t provide a height section.

Can I hire you as a collective? You provide the details and questions I would have wished from my architect.... A discussion with constructive improvements... argh, you could write me a PM....

Remove the staircase landing and reduce the surface consumption. We found a landing staircase practical and he said, it fits in easily......

Well, I wouldn’t do it, but as I already said, that’s also a matter of taste. If you like it, you should consider whether you’re willing to give up a bit elsewhere for it. Also, it depends on the floor heights, which we don’t know, and whether it really has to be such a mega-monster.

I actually wanted to do the entire ground floor without separate controllers, since it should be equally warm everywhere, but there should be cooling.

Yes, then as I said, the tip is to also lay loops in the pantry and install a controller there. I wouldn’t save on that.

The landing is not really my thing either, but he said some weather protection is a must since we are directly in the house as soon as we open the door.

Basically, I’m also in favor of a house entrance canopy, but this one is quite special, isn’t it? Is there something nice as well? (Just kidding.) No, seriously, it’s a matter of taste. You have to like it.

Many podium stairs have a bit of an office floor/office corridor feel. If you choose the wrong flooring, you no longer have an end of workday.
What of course neutralizes any (nice) staircase and basically negates any effect are the built-in cabinets underneath. In my opinion, you can get the most beautiful furniture for these special installations in an expensive furniture boutique. I also can’t imagine that people like to open these apothecary cabinets (if they are supposed to be the hyped APO cabinets: even a well-stocked 40 cm cabinet in a kitchen sometimes makes you sweat when you want to open it).
But it’s really a matter of taste.
I find it nicer when the staircase start is changed/mirrored so that you’re not immediately hit by the side wall when you come in. So the railing is visible. Then you can still make a storage space under the height, which doesn’t visually stand out negatively.

, but somehow it doesn’t get any better.

Yes, it does get better! Just because there’s still criticism doesn’t mean it hasn’t improved.

Phew, do you really need over 5 linear meters of cabinets for food? If you plan 2 base cabinets with a countertop and have a toaster or kitchen machine there, the storage space* next to it is still enough, but you might also want to bake your bread in natural light or work with the kitchen machine. *I would rather count one cabinet side of the pantry to the wardrobe, because it has .no. deep cabinets, so you can’t hang anything on a hanger there. The pantry can easily handle 30 cm cabinets, clothing cannot.

Needing is always relative, but I completely support your idea. Personally, I would have planned without a window just for storage. A mix of a second kitchen and pantry with a window would certainly be the optimal solution. Shelves on the inner walls and a kitchen unit under the window on the outer wall. Very practical to banish all the unsightly appliances from the main kitchen and especially very advantageous in such an open floor plan in terms of noise. Especially when you do something with the kitchen machine as mentioned, the noise would certainly disturb people in the living room watching TV from the main kitchen. Also, devices like a dehydrator, an air fryer, a popcorn machine, etc. can be stored well there. Such large or loud devices are much less disturbing there.