Where is the drain planned? You can't just move the toilet anywhere you want. For the shower, as Jaydee says: plan 10 cm more on the left and right... it can be used well as a shelf. In your original plan, when you come in you look directly at the toilet (or the person using it)... not nice...! Somewhere above I read "boring." I would like to say that structured arrangements—mostly in a row—usually look more elegant because you can frame two objects quite well with tiles, which leads to more clarity. But of course, that's a matter of taste. I would now spontaneously plan the washbasin on the wall next to the toilet so that it hides the toilet. I would place the tub centrally between the exterior wall and the shower wall, but not with distance from the wall. Or the idea from earlier, the tub directly on the short side... but first have the drain clarified. Plumbers quickly say: it doesn’t work, it’s difficult, we won’t do it! And then you’re left with the fancy bathroom plan...