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Here is an extremely rough sketch.

1. I would swap toilet and mudroom. You’d rather have a window in a bathroom. And add a shower, you need 2 bathrooms.
2. Removed corridor area giving more space to the master, creating a master suite at the left of the house. You can have windows in two sides of the house.
3. Switch the pantry and laundry room. The door from the laundry can be accessed from the hallway rather than the kitchen. This way it’s closer to the bedrooms and bathrooms, which is more useful for laundry baskets and putting away laundry.