Floor plan design: Is the hallway on the ground floor wide enough?

Due to the issue with the corridor width, we have already reduced the originally planned floor height from 2.61 m to 2.50 m,

Ouch. 2.50 for the ground floor, you want that? For this mega-house actually inappropriate, I think. I now see 3 studies. Would it be conceivable to do without the one on the ground floor?

At first glance, I would position the house like this so that I have a nice big garden. The entrance then rather from the side. Is this leading too far, to rethink the entire ground floor?

Kaho is responsible for drawing plans. She is better at that.

I would remove the shower on the ground floor. 75 cm is very narrow. The shower trays from the 80s are wider.
Remove the study on the ground floor.
Make the kitchen narrower. The distance between the rows is too wide.

Plan a cloakroom so that shoes and jackets are set slightly aside. A sleek built-in wardrobe under the stairs. There are some examples here or on Pinterest.

A reasonable storage room near the kitchen.

Open-plan kitchen with a deep peninsula.

Living room separate with hallway access.

The staircase needs a different place. Possibly rotate it 90 degrees.

If the staircase changes, there are changes on the upper floor.
I would combine the dressing room with the master bedroom there.

Kaho is responsible for drawing plans. She is better at it.

Thanks for the compliments, however I am completely not available this weekend...

Escaping the heat?

Only 1 week until vacation
And now we're heading to the small natural swimming pool a few towns away
Not so crowded and with a stream for the little ones

I don't see any garden exit from the kitchen or dining area at all. Are you aware that the access from the terrace to the kitchen is more important? -> Barbecue, coffee, children's party?
I think it's a shame that the living room does not have access to the hallway, but it does have access to the garden. This way you are locking out the garden. The connection is missing.
The shelves in the hallway, which stand in the middle, completely confuse me. Built-in wardrobes in the hallway should be enough for bags and shoes. That is the fate when building with a basement. Be careful not to clutter your hallway.

Despite the gigantic house size, I see quite compact rooms upstairs.
Do you really need two independent offices plus a guest room? They are unused most of the time. I would consider whether one home office could merge with the guest room. Upstairs I would do without the office. Use the space for a dressing room and rotate the staircase so that you can benefit from it a bit. Because: a staircase with a landing is also there because it is beautiful. You get nothing from it with the closed rooms at all.
If necessary, swap the guest WC and storage room (pay attention to the wardrobe cabinet) and possibly swap living room and kitchen.