Personally, I would find the hallway a bit tight. As soon as you say goodbye to more than 3 guests, it gets cramped. Just getting 2 children ready will already be a bit tricky. I would also leave out the vestibule. Possibly swap the WC and vestibule so that the hallway is not so awkwardly angled. But that’s a matter of taste. Then the utility room is definitely too small. Or are you putting the building services somewhere else? Basement?
I personally don’t like having to walk through the living room when you want to get to the sleeping area.
Did you deliberately choose a closed kitchen?
Then I would move the desk from the master bedroom to the guest room.
I would have swapped the living area and the sleeping area. The advantage is that you can use the garden better and, for example, have a nice surrounding terrace. In addition, you can combine the two smaller hallways into one large one, saving doors and corners. (Take a look at our floor plan, then you’ll know what I mean)
Then a little tip from a mom of a 2.5-year-old ... the stairs will still cost you nerves at that spot! Not necessarily as a danger to the children (you can block them off), but balls (and other toys) roll wonderfully down such a staircase. For each child, this is fun for about 3 years (no matter how often you forbid it). Additionally, depending on the direction (up or down), such a staircase often causes drafts or cold air to flow upwards.
Garage: I would have removed the equipment annex. That way you can move the garage further back and the house forward. The equipment also fits perfectly in a large shed.