The brick walls are very unique inside a bathroom. May I ask what country you are in and how old the house is? And I think you meant 9 feet by 6 feet, right?

I agree with divadeva. More lights. If you can add pot lights do it. If they're already there add task lighting and up the wattage on the bulbs on the pot lights (replace with LED and you can make them brighter because the wattage on LED is lower for brighter light). If you have all of that add decorative lighting. If ventilation is an issue find a way to move the air around or add air filtration. Maybe the HVAC is deficient. Maybe you can add a HEPA filter instead of the standard one that comes with the unit. Call an HVAC specialist to see if there is a way to boost air flow in the room.

The size of the bedrooms seems quite good to us, but the bathrooms and the walk-in closets could be a bit bigger keeping in mind the overall area of the house. Best of luck with your future home, WallUp

Price is not a function of design. It depends on the finish n material. You should specify what your budget for a stone top dining table set is.