Why not just make the sink swivel over to the window so there is room for the shower? Then you would have access to the sink while you shower and to the toilet while you shower , in case you want to take a wet dodoo in the middle of shower time.
Wet TP is always an issue when wet-dodooing, but thats what soap is for, right?
The swinging sink is concept popular on the boats. I have it in my Sprinter conversion, although with dry bath. Did you notice the guy never enter the bathroom? That would be interesting picture after seeing him passing the main door sideway.
For a base price of $163,662 you should indeed get some nice features. I can accomplish roughly the same thing with an extra shower curtain covering the toilet area. I would rather not have the extra weight of a moving hard sided wall. In fact weight seems to be an issue for this unit. It really needed DRW to handle the weight to be able to use those massive storage compartments. I bet most of the users end up overloading the rear axle/tires.