Awesome small floor plan! Practically two suites, and separated by their bathrooms. Plus a sunroom and an open concept. I would break up closet space for guest room. Create coat closet and entry to that bathroom with small hallway and door to guest room. Possibly smaller doorway into master suite so closet can be bigger. Closet at entry could be a pantry closet instead of coat closet. Could have covered patio on back.
Maria del Socorro pinzon
1918 by EW Stillwell, design #R-88. 1st fl bedroom, put a bath in its place attached to the den and the hall, larger closet in den as well. The kitchen should lose the door directly to the dining room, breakfast nook could be a small greenhouse or sunroom, back porch could be a pantry / mud room. 2nd floor: lose the dressing room, turn into bath. Existing bath is incorporated into sleeping porch and larger landing