I agree with Cpartist"s layout and like moving the closet over as suggested by D M so that bedroom 3 has easier access to the bathroom. Do you have room to have the toilet face the tub and add a linen cabinet next to the toilet? How wide is the tub toilet area?

A goof ring might work aesthetically if it's the same size of the new light. I'd be curious how you physically hung the new light from the old recessed housing? Are the wiring connections exposed?

Thank you so much for these really helpful comments. @kandrewspa, Interesting suggestion about changing the sconces next to the mirrors, and I'll consider it although I do really love the ones I've got. Re the ceiling fixture, I do have one but unfortunately it is primarily an exhaust fan with just a small LED light, which I forgot to turn on when I took my photos. I need that fan, and there isn't room for an additional ceiling fixture. That's why I wanted to put in the lighting over the mirrors, to augment the sconces at the sides. I do already have both categories of lighting on dimmer switches; forgot to mention that. @JustMe, for up-facing sconces to go above the mirrors, do you mean something like this or this from Justice Design, or this one from Capital Lighting, or this one from Swiss Passport? Would you place them above each mirror, or between them?

I'll be a contrarian. I would never knowingly rent a room with a shared bathroom in the hall. That would be a complete pass - I don't even like having to use a hallway bathroom in a sleeping situation in which I would share with friends and family because if I need to use it in the night I would have to wake up more/get more decently dressed and I hate having to shlep stuff to take a shower or perform normal grooming stuff in a bathroom. I don't have the horror of viewing a toilet from a bedroom that some houzzers seem to have. It certainly wouldn't bother me on a temporary basis. I have a master bath in my home and I can't remember the last time I actually shut the door. I don't have issues with smells or humidity but perhaps that is because my Toto washlet has a built in deodorizer AND I have an excellent Panasonic fan which runs based on ambient humidity levels. I don't generally even have condensation on shower doors or mirrors after exiting let along huge amounts of humidity wafting through my bedroom. The question really is one of economics. There is a cost to installing the bathroom and OP would need to decide whether they would make up the expense by having increased rent and/or renting it out more frequently. Certainly any prospective renter would see a picture and determine whether they wanted the ensuite with a curtain in the room or use of a bathroom in the hall. Also resale value is a red herring. At such point that OP wanted to sell it would be relatively inexpensive to convert the bathroom into a closet if having the ensuite in that room was a negative.