Floor plan for 200 sqm city villa - Are wishes achievable?

With your current kitchen of 22 sqm, that's fine, but the planned one is very unharmonious, impractical, and 5 sqm larger.
The planner's design with the table in the corner, which can't be used, doesn't really need to be pursued further.

Yes, the table is indeed oddly placed there, as a seating area is supposed to be there, it's just depicted incorrectly - but it fits.
I'll take a look at the ergonomics in the kitchen.

I believe the fundamental problem is also that we have such a strange orientation with the plot to the side, because it is a corner plot with access on the long street side. If you plan a long hallway there and the house is not supposed to go further back, everything automatically gets narrower behind the hallway. If you then have the kitchen there and want something on both sides, it all gets quite tight with one block.

You also find fewer floor plans for inspiration with a terrace on the side. Basically, our design was planned in that style, only with the terrace at the back, and then the plot came our way.

By now it is clear to me that it does not make much sense to plan a house without a plot, but more or less the floor plan was adapted to the plot and this is what came out of it.

We wanted to find a plot via GU/GÜ, since you actually start planning without a plot then. In the end, we found the plot ourselves after all.

You write that you need the large dining area because all family celebrations always take place at your house. But precisely then, I don't understand the closed concept. Do you really want to work alone in the kitchen while the rest of the family has fun at the large table and in the living room?

For the same reasons, we have a large table for 12 people, even though there are only two of us. Our concept has worked out – we almost always have guests, and we like that. But I genuinely enjoy being able to continue working comfortably in the kitchen and still talk to my guests. When something is ready, someone quickly gets up from the table and fetches it from the island. If I need a helping hand, it’s visible, and I can directly ask the man/woman. I am also always right in the middle while cooking.

Therefore, I would reconsider an open floor plan. Especially with a child who is obviously just becoming very mobile and gets up to all sorts of mischief. Do you want to stand in the kitchen while your little one plays in the living room and you can't keep an eye on them? And only when it suddenly gets suspiciously quiet in the living room or loud crying starts, you rush there and see what your little devil has gotten up to? I don’t have children, but that would be too risky for me...

So just a suggestion to think about. If you still want to keep the closed concept and have two dining areas standing next to each other, then go ahead. I find it impractical.

Otherwise, a lot has already been said about the floor plan, with which I agree: big, but somehow you don’t really notice it. The upper floor really looks like Tetris, and that’s never good.

We would also have liked a straight staircase, it looks great. But then we would have had to build 3 meters longer and had way too much space. Now it is a quarter-turn stair – sure, not as cool as a straight staircase, but I can live with that. Useless space is expensive. For us, over €3,000 per square meter. The house is 9 meters wide, so you can figure out how much we saved just because the staircase is allowed to be angled. Just something to think about...

There are designs where a straight staircase fits, and then that’s great. But I would not accept a room-Tetris just so the staircase is straight. Better a clear room structure and the staircase just has to fit.

just look at it this way:
with a straight staircase, when you reach the end, you have to turn either left or right anyway.
so you might as well take a quarter-turn one

You write that you need the large dining area because all family celebrations always take place at your place. But precisely then, I don't understand the closed concept. Do you really want to work alone in the kitchen while the rest of the family is having fun at the large table and in the living room?

For the same reasons, we have a large table for 12 people, even though there are only two of us. Our concept has worked out – we almost always have guests and we like that. But I really enjoy that I can continue working comfortably in the kitchen and still chat with my guests. When something is ready, someone quickly gets up from the table and takes it from the island. If I need a helping hand, you can see that or I can directly ask the man/woman. I am always right in the middle while cooking.

Thanks for your detailed comment.

I felt that a kitchen with a sliding door was a good way to combine both.
Currently, we do not have it any other way. Closed kitchen (with a hinged door) and then comes directly the dining table (only unfortunately this one is too small).

The advantages of a closed kitchen, as I see it, are that when cooking something with strong odors you can simply close it.
And you don't "make a mess" in the living/dining area.
When I see the fat deposits that form in the kitchen from all the cooking... if I imagine that all that would then be in the living/dining area—oops:

just see it this way: with a straight staircase, when you reach the end, you have to turn either left or right anyway. so you might as well take a quarter-turn staircase

You are of course right about that. However, I also find the quarter-turn staircase not ideal with this floor plan. you walk straight towards it, but you have all already said that. The hallway itself is not small at 18 sqm, but a staircase for a floor height of 3.25 m is correspondingly large. It’s just not so easy to part with the planned design; when you redraw, you quickly end up with very similar concepts. Super difficult. I will try again later.