Houzz is the new way to design your home.
tub can fit below existing window. If possible, shower can fit next to existing window.
sink can fit where existing sink is and can add additrional sink in space where countertop exists over open space.
Perhaps we can add the space entering the bathroom as an area for bathroom entre.
This is similar to our present set-up. Not so much to change.
A space for everything is most helpful
Wall mounting faucets..an interesting concept.