ᐅ Single-family house floor plan – where to place the mudroom?

Hello everyone,
we are currently in the planning phase and have just received our first draft – however, there are still a few things that are not quite satisfactory or were forgotten in the drawings. Before I ask my detailed questions, here are the most important details:

Development Plan / Restrictions
Plot size: 980m² (11,000 sq ft)
Slope: no
Floor area ratio: 250m² (2,690 sq ft)
Building envelope, building line and boundary: approx. 12x12m (39x39 ft)
Number of parking spaces: 2
Number of floors: 2
Roof type: gable roof

Client Requirements
Style, roof shape, building type: classic gable roof single-family house
Basement, floors: no basement, 1.5 to 2 floors
Number of occupants, age: 2 adults, up to 2 children
Space requirement on ground and upper floor: approx. 160-170m² (1,720-1,830 sq ft)
Office: one office with desk (plus shelves etc.)
Overnight guests per year: very rare
Open kitchen, cooking island: yes/yes
Number of dining seats: 6-8
Fireplace: yes, ideally recessed between living/dining area
Garage, carport: yes, connected via carport to a large garage at entrance door
Other wishes/special features/daily routine, also reasons why certain things should or should not be included: bedroom should occupy the entire gable, absolutely need a “mudroom” for dog etc.

House Design
Planning by:
- own design with support from building planner

We currently have three main points that we are not happy with:

1.: What was forgotten: our big wish for a “mudroom.” We have a dog, horses, and a goose, so we come home with dirty shoes and pants (some of which also smell a little). We quickly dismissed the idea of extending the garage and putting everything back there to change, because our things need to dry there (= heating). My dream would be a second entrance from the garden or carport leading into a separate room, ideally adjacent to the utility room (with a door, as I don’t want my riding boots drying next to the white laundry). I just haven’t had the perfect idea yet on how to implement this elegantly.

2.: The bedroom is too large. We want the entire gable as a bedroom because we have a fantastic view. However, 27m² (290 sq ft) is huge, even with a walk-in closet. Do you have any ideas on how we could redesign it?

3.: I had hoped that the attic could possibly be used later as an additional office/dressing room or similar. Now the building planner told us that the attic is too small for such purposes and therefore did not include a fixed staircase. This surprised me a bit, as I find the attic in a similarly sized house at a friend’s place quite spacious. Am I missing something, or am I misreading the drawing? Are the 2m (6.6 ft) lines the exterior dimensions or actually the (insulated) ceiling height inside? Is there really no way to make use of the attic space with these dimensions?

Of course, I am also open to any other comments on the floor plan.

Thank you very much in advance!!