I have uploaded the floor plan for you, that is the dimensions of my bathroom. It also shows how our architect (she is bad) would do it. But I don't like it.
No!
The best advice is: take it. EXACTLY! LIKE THIS!
As a reminder: we are still talking about – so an end-terrace house (developer property).
This is completely the most wrong "victim" for an effort to achieve a one hundred percent match with a dream house. It will fail by far, come hell or high water, with drums and trumpets, beyond even the wildest fantasies of construction fiasco documentary binge-watchers.
Maybe you don’t like the compromises – but you should have thought about that earlier and not chosen a developer dream realization path that is the least suitable kind for individualists. The results of your change efforts (unique disaster instead of minimal error 08/15) would certainly please you much less. Ilsebill Fischer seems to be sorely neglected in today’s German lessons.