No, that would not be for me either. I want to sleep in on the weekend and my husband, as well as the children, are early risers. Then my sleep would be interrupted and mine are not the quietest people either.
Especially... apart from the "unfamiliar" and so on: when bathing and showering, water vapor is produced. That then soaks into the wallpaper or paneling or whatever. :( You really end up with moisture everywhere (floor, walls, ceiling).
I also think that is not a good solution, having the bathroom in the bedroom. The humidity can then make living uncomfortable. The architect must find another solution here.