Make master smaller and increase family room. Reconfigure master bath and closets to make the 2 beds bigger. Pantry separate room linked to utility. Big linen closet and ironing space somewhere near beds.
Like connection between kitchen & garage. Tweak further to have walk-through mudroom, laundry, side entry, narrow house-stores/pantry & main entry closet. Other side of main entry would depend on width of lot.
Large 5 bedroom family home to show you. It's a good size and would suit the growing family. The guest bedroom could be used as a teenagers retreat. The master is spacious with its own living area and huge WIR behind the bed.