Commented: Master Bath RenoIf you got rid of the tub and replace it with some type of linen storage, like a chest under the window, then you could take away the linen closet and extend the shower into that space.
Commented: Grab bar placement in showerDepending how far away you plan to put your shower head from the shower entry, you can use a Delta Adjustable Slide Bar / Grab Bar Assembly with a hand shower instead.
Adjustable Slide Bar / Grab Bar ...