Depending on the size of the remodel.

1st I would remove the door from the shower room and add a glass door/trim. I would turn the whole room into a large shower, using the recessed "display space to put a bench seat and shampoo nieche in the shower.

2nd there shouldn't be a window above a vanity, ideally you would remove the window or hang a mirror from the ceiling that covers the window so that you can eliminate the medicine cabinets. Any idea why the 45's are there? Or could you demo those and have a nice square space for the vanity, allowing for you to install drawers down both sides of the sink.

That is kind of cute. Seems like you would have to have a custom vanity built to fit that space. Could you do one with drawers in the middle to hold the medicine chest stuff. You've got plenty of storage elsewhere. I would remove the medicine cabinet and have two mirrors cut to fit that space on either side of the window.

Robin, if you like the separate rooms in this set-up I do have some ideas to make them a bit nicer. First thing I thought of was that the things on the shelves in the shower room may get damp, making the shelves less usable. So I thought of closing off the front of the shelves and opening them from the other side, the toilet room. One might say that then things on the shelves could get exposed to malodorous air and not be so fresh. So, I thought of my Toto toilet seat with the deodorizing fan. It really does work to contain most of the smell, if you flush before standing. So, add an electrical outlet to the toilet room and add a Toto Washlet with deodorizing fan. It will make all the spaces more pleasant. Then you can have the closet open into the toilet room (though you can put a door on it, instead of having open shelves). If you don't want that, you could alternatively get an exhaust fan for the shower area that is turned on by humidistat, so that it is always on when the shower is used, to draw the dampness out of the room. That may make the shelves more usable. You still have to navigate two doors to get to them, though!

The best solution for this space in my eyes is to remove a few walls and doors. It will open the room up and give you options. Even if you keep the same footprint, it will feel more spacious. Of course, this is all a matter of taste and if you like the rooms, then keep them.

Do the corner med cabs have flat backs, or are they the ones designed to go into corners and have a deeper section in the back, being triangular shaped? Are they in good enough shape to look good with a new vanity? How is this set-up working for you? Do you like the window there? I have also seen a mirror suspended from the ceiling that hangs in front of a window in pictures of bathroom remodels. It can look nice. But squaring off the vanity and work space does give you more room. Getting rid of the wall between the vanity and toilet can give you at least 4" more width for a vanity. There may be more space available, depending on how close the toilet is to the wall.