Floor Plan Optimization - Fireplace Problem

So, as a teenager I was not in the bathtub with my partner in my parents' house..

Surely they didn’t have a master bathroom either, but you had the option to bathe.
I was often able to use my parents’ tub in the adjacent bathroom and I did.
A comparison to the past and one’s own needs usually falls short.

but because of the door this is unfortunately not possible..

That is why at least 3 people here plus like-users recommend a revision.

Since we want an attached parents’ bathroom, it has become a walk-through room.

That can be done better. For example, one could do without the entrance stub in the bedroom entrance and plan the bathroom entrance from the hallway. Then there might also be more space for a wardrobe. Having the bedroom as a walk-through is quite uncomfortable because you disturb the sleeping partner when turning on the light. Having peace and quiet independently is simply not possible here.
If planning with a basement, I would mirror the upper floor so that the pantry is closer to the kitchen.

I had already thought about the shower above, but unfortunately that is not possible because of the door.

You could do without the airspace, move the door to the children's bathroom. Then you would also have options to relocate the entrance to your bathroom, including access to the bedroom.

Why is the pantry so far from the kitchen?

What exactly is the fireplace supposed to look like?

I would reconsider the entire layout of the upper floor.

And ultimately, top down, also that of the ground floor.

Hi, why is that? What stands out negatively?

Even you yourself express enough shortcomings to think about a relaunch, among other things

I had already considered the shower above, but because of the door, unfortunately, that is not possible.. I also thought that you could extend the ceiling of the ground floor / floor of the upper floor over the last step and thereby create more space for the door.. but according to the architect, that is not possible..

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The "problem" is the chimney, or rather its placement..

The problem is rather that you want to use the chimney in a double function as a wall division element. Perhaps you better get inspired by and instead use a zigzag wall (which also works without a piano). In a modern new building (at least if it were an EH40) I would in any case only recommend a fireplace simulation, which would solve the chimney problem right away.

Well, I wasn’t in the bathtub with my partner as a teenager at my parents’ house.. the shower in the kids’ bathroom is certainly enough for that..

How unromantic, a bathtub bath cannot be done in a shower.

Technology goes into the basement.

What does the plot say about whether a basement is even offered? Am I correct in assuming that your forum name is to be read as a hint at a self-planner, and the architect (probably even with quotation marks) here is just a drafter of the laypeople's elaborations?

Here quickly. Something like this?

Here quickly. Something like this?

But the chimney in the ground floor and first floor are not aligned. Integrating a chimney into the wall was rejected by our general contractor back then, it would cause cracks.