Run the soil "branch" (not stack) outside and you can have the ensuite(s) you desire... they add value to a property... visible branches do not detract from it!
Make the waste work the easiest way possible and enjoy comfort living from the inside without worrying about what you see when you look up on the odd occasion... that's what I'd do!
its all good thanks, id prefer to have it as a bath with shower over as I have never had a bath leak but showers leak nearly every year.