Hello, thank you for the suggestion. Unfortunately, where the shower is currently planned, it is already determined that a pre-wall element with about 22 cm depth must be installed (the shower on the upper floor is planned above it, and above that is the dormer with the ventilation already installed there!). The controlled residential ventilation pipes must also run exactly at that spot from the technical room to the upper floor. Unfortunately, there is no other possibility for this.
But similarly angled would also have been my nicest idea so far, just on the right side. The shower would then be in the top left as before. Toilet in the front left, next to it a half-height drywall partition and then the sink (different from the plan) so that it does not block the view of the bathtub.