I'm also in favor of small hallways, but this "strip" in front of the stairs is a no-go! It's called parents' bathroom, so there's something for the kids too, right? Upstairs? I don't see a knee wall, so basement? Why only windows on two sides then? Is that a tower? The 2.5 m closet in the bedroom isn't great either (a bit small, in the long run). Oh right, it's about the bathroom as well... ;) Maybe move the bathtub forward, then put the toilet in the back corner, so you can place cabinets on the left and right of the double sink. If necessary, make the door 10 cm narrower...