Floor plan design for a single-family house 230-235 m² on two full floors

In the meantime, we have put quite a lot of thought into a sensible, well-usable, and hopefully also nice floor plan and would like to reach a final result fairly soon. We are looking forward to the feedback and thank you in advance for any tips or hints. :)

Development plan/Restrictions
Plot size 2,600 m², completely flat
Floor area ratio / gross floor area ratio: 0.4 / 0.8
Number of floors: two full floors
Roof shape: hip or pyramid roof with 22-25°
Style: "modern"
Orientation: the floor plans are always oriented with north at the top, the street side is on the east
Maximum heights/limits: the eaves height of 6 meters is somewhat tight, otherwise there is really plenty of room. Building windows etc. are sufficiently large, we do not have to apply for any exceptions to the development plan.

Client requirements
Style, roof shape, building type: "city villa," hip or pyramid roof with 22-25°
no basement, two full floors
two adults, three children currently under 3 years
Space requirements on the ground floor and upper floor: three children's rooms with children's shower bathroom, guest room and office as two separate rooms
rather open architecture on the ground floor
A gas fireplace is an option, but we will probably do without it (effort of gas connection and chimney costs)
Garage and carport are both planned (approx. 6x9m and carport between house and garage approx. 4x7m)

House design
Who designed it: own design based on the discussed external dimensions of approx. 12x12 meters
What do you particularly like? Why? The house is quite large and incorporates all the room ideas (3 children’s rooms, with children’s shower bathroom, separate guest room, and office, etc.). We like the orientation according to the cardinal directions (living room SW, children’s rooms S and SW, master bedroom and guest room to the W facing the garden, bathrooms to the E, front door to the N).
What do you not like? Why? The plan is mainly focused on usability rather than purely on the aesthetics. Representative corridors with little practical use were avoided, for example. However, we find it difficult to align the windows symmetrically and appealingly one above the other on the ground and upper floors. This is visible, for example, with the window in the children’s shower bathroom and the utility room below it.
Preferred heating technology: geothermal heat pump, but probably it will be an air-to-water heat pump for cost reasons

If you have to do without, which details/extensions
-you can do without: KfW40+ with large photovoltaic system (would then instead opt for KfW55 with medium photovoltaic), clinker brickwork, floor cooling, en-suite guest bathroom, possibly the showers could generally be a bit smaller if it gets too expensive
-you cannot do without: children’s shower bathroom, (tendentially) controlled ventilation

What is the most important/basic question about the floor plan summarized in 130 characters?
Are we overlooking things in this floor plan that would annoy us daily later because they were planned incorrectly or totally impractical? Can we still find a visual trick for the outdoor symmetry?

Many thanks!

Can we still find a visual trick for the symmetry from the outside?

Yes, skip that and plan the windows according to what the rooms need. Mainly adjust between the ground floor and the upper floor.

Why this square shape? For the house size, a rectangular shape offers advantages in my opinion, e.g., 10.5m x 13.5m or something similar. That could, for example, make the staircase area brighter and more attractive. By the way, I find that area a bit too optimized for space given the house size.

Hello :-)

I’m not really satisfied with the open-plan area yet. Because of the square shape, you have too much space in the living area, while the kitchen-dining area feels cramped.
Is this recessed corner in the kitchen meant for a SBS fridge? Can it be fully opened if it’s placed so close to the wall?

For five people, I find the hallway much too small. Where do you want to put all your coats and shoes? Overall, there is a lack of storage rooms. Keep in mind, you don't have a cellar. Our house is similarly sized, but with five people we have an 18 sqm storage room, a 6 sqm storage room, and a significantly larger hallway. We have little "stuff" and still, I wouldn’t want less space! The children's rooms are smaller - I find them almost too big in your case; I would prefer more storage space. Even if you don't aim for a special floor plan - I think there is still room for improvement here. It should still be a bit cozy, right?

Phew, first of all you would need measurements...

But beforehand, what can be said without them:

[*]Poor entrance area --> for this "hut" (usually I always criticize this because it is usually too large, here it's the opposite...)
[*]The upper floor hallway is/is going to be dark
[*]During the "session" upstairs you can shower at the same time...
[*]Now it already has 71 m² living/dining/cooking and you can't even reach the table without "mountaineering boots"
[*]But about 15 m² in the living area without real use...
[*]Child 1 has only 18 m² on paper with this layout, closet max 1.5 m...
[*]Storage rooms/areas, as the predecessor already noted, nowhere to be found...

There are good approaches (the overall size :)), but the symmetry (or rather the lack of symmetry) of the windows is not the problem here...

If necessary, the showers could generally be a bit smaller if it gets too expensive

What exactly does "too expensive" mean? I remember that you also wanted a pool ...