I think having 2 doors in the bathroom is a huge disaster. I experienced that once in a hotel (and I was there only with my husband) and we found it awful. Always having to close 2 doors is just not acceptable. I think access to the bathroom and bedroom through the dressing room is the most sensible solution for us. The dressing room then functions a bit like an airlock or hallway. From the bedroom through the dressing room into the bathroom, back to the dressing room to, well, get dressed and then out. And if I were to build a house, definitely not with an interior bathroom. Regarding the orientation, I see it this way: who needs a bedroom facing south, it just heats up unnecessarily there.