ᐅ Need help with bungalow design shortly before submitting the building permit application

We (mid-40s, no children) are about to submit the building permit/planning application for our bungalow and have finally received the preliminary drawings for the house. Unfortunately, a number of questions have come up. Since we only have one free consultation with the architect, we are trying to gather some advice and suggestions about the plans here.

I have filled in the following key data and also described what we particularly do not like:

Development plan/restrictions:
Plot size: 600 m² (approximately 6500 sq ft)
Slope: flat
Site coverage ratio: 0.3
Floor area ratio: 0.3
Building window, building line and boundary: 3 m (10 feet)
Number of parking spaces: 2
Number of floors: 1
Roof type: 25-degree (25°) hipped roof
Architectural style: L-shaped bungalow - classic
Orientation: no preference

Owners’ requirements
Style, roof type, building type
Basement, floors
Number of occupants, age: mid-40s
Space requirements on ground floor and upper floor
Office: family use or home office?
Guest sleepers per year: max 1-2 days, one person
Open or closed layout
Conservative or modern design: rather conservative
Open kitchen, cooking island: no
Number of dining seats: 4
Fireplace: no
Music/stereo wall: no
Garage, carport: carport
Other wishes/particulars/daily routine: 2 working people
Preferred heating technology: air-to-water heat pump, ventilation with heat recovery

House design
Planner: designer from a building company
What do we like especially? Size of living area, floor-to-ceiling elements facing the terrace, unobstructed southern view thanks to the rainwater retention basin
What do we not like? Small bathroom size (the drawn T-shaped layout probably won’t work), limited space in the living room, little room for (clothes) cabinets, restricted coat rack space.

Any help, criticism, or suggestions are warmly welcome. Many thanks in advance….