It is not supposed to be built for me. And from the owners, I had the impression that except for the fear that it might become too expensive for them, they liked it. So until just now, I would have wanted to answer: from the perspective that it does not have to be to my taste, and measured by what the average owner usually likes, it is okay in the middle field. But it's good that you asked again: I just took another look at the floor plans – with the result: the headroom of the stairs from the basement to the ground floor becomes questionable in the incongruence area of the landings (I didn't count now whether it is only "watch out!" or already "ouch!"). So: "to the first, to the second, and to the ... detention!" :)
With the basement being raised by one and a half steps, the staircase would have to be revised anyway...
Judging floor plans is not always so easy; there are often reasons why certain things are the way they are.
I also often see floor plans with 12 sqm children’s rooms and 30 sqm hallways on the upper floor. For me, an absolute design failure; for others, the idea of their dream house. It's a matter of taste and also depends greatly on the local circumstances.
The height of the basement stairs is of course a mistake by the draftsman that should not have happened again. Honestly, I never noticed that. But I’m just an average owner.
But since the house will not be built like this, it is now irrelevant.