The top photo is current, and the others are inspiration? You really already have a wonderful space. You could use some hardware on the cabinets, doors and drawers could be refaced to Shaker style, and tub and shower COULD be changed, but they are really not bad now. One change might be to close off one of the shower doors with a fixed pane of glass and remove the other for a walk-in. This would enable you, with some plumbing adjustments (none of which are inexpensive) to move a potential free-standing tub over to one window