City Villa Floor Plan - Request for Opinions, Criticism, Improvements

Exactly the same, only that the focus of the tight areas is different. Following reasons:

16.5 sqm just for the wet areas. Can be reduced. Not necessary.
The shower on the ground floor is also blocked by the toilet.
Actually also upstairs. What kind of shower measurement is that?
Doing laundry goes through two doors, namely the WC... somehow weird, this trapped room. There might be worse, but since there is no other storage room, it would probably be very impractical if you also want to use the guest toilet.
I find the kitchen offers too little storage and work surface. Fridge and oven = 2 tall cabinets (the freezer is behind the guest WC), then the corner for coffee machine, toaster and kettle, leaving a small corner between sink and stove for preparation, and you can’t even use it with two people.
The hallway is nicely wide, there is also space for a sideboard with chair. You could still plan a small closet under the stairs. Coatroom in the office...
What is the planner actually thinking with the oversized bedrooms? Is it your wish to spend your tea time there?
I am a fan of closet space in the bedroom, but you shouldn’t have to round off the corners just to get past.

Maybe you simply write down why the office is so important to you as it is now, with the 10 sqm.
And why is the kitchen squeezed into less than 8 sqm, while the bathroom and bedroom invite you to dance?

Would you please name the developer so one can see what else they offer?

Take a look at Batsy's draft in the green forum: that is also 135 sqm. However, I would rearrange the bathroom (see Criminal) and put a huge wall unit as storage space in the overly long corridor upstairs. For that, make the bedroom a bit smaller there and of course remove the intermediate door between the dressing room/bedroom.

Edit: sorry, the office is missing

I unfortunately did not find the post in the forum search under the terms "Batsy" or in the "green forum". Do you perhaps have a direct link for me?

By the way, the children's rooms are okay for the size of the house. They can be 1 sqm smaller if necessary. The bedroom is pure wasted space and the side of the bed is disastrous. Use tomorrow evening to list your clothing, outdoor gear, cleaning supplies, etc. Write down how many 60 cm cabinets you need to fill. How big does the kitchen need to be to store all your things? Include new small appliances as well. Drink crates and such. A U-shaped kitchen is not the worst option for smaller houses. A laundry room with a cabinet from wall to wall can replace the office, but guests go to the hotel. There are so many storage threads here in the forum... I advocate for a gable roof house.

that’s good! I see a more rectangular house on the property.

Storage space is used mainly when it’s available. In my opinion, a so-called guest room is always the best because it keeps you flexible. Depending on life circumstances, it can be an extra children’s room, a home office, a guest room because the great-aunt now has to be invited monthly. Or simply a "junk room" where all the useless stuff is stuffed that could have long since been sold on eBay Classifieds or thrown away. Also for a possible sale: “5-room” sounds better than “4 rooms and a storage room upstairs.” Anyway. I just thought of a floor plan for a rectangular house: Google “Helma Musterhaus Chemnitz,” it can possibly be downsized a bit, but it’s very intelligently laid out!

By the way, it would be more productive for the discussion if you would also say something about the ideas presented to you here.