I reckon you might still be able to get the bath but I think it would mean having a wall of sliding door robes instead of a WIR. But you could see what a draftsman comes up with when it's all done to scale.
I swapped them so the rumpus has the north and western sun - as its so cold down there trying to have all of the living area on that side. We were also hoping to have the fireplace on the dividing wall so that it will service both rooms. Annoying that I can't get it to fit in 'just right'! They are happy to make whatever changes under the same roofline and sqm.
I'm happy not to have a walk in robe if need be - bath is more important to me (not so much to hubby whos not really a bath person)
Thanks heaps for your feedback - I will have a good think about the room placement