kooopons, that wall is 46". How much space do you have between the wall and the door opening where the tub will be? One option with the tub sticking out would be to build out that 27.5" wall and recess one end of the shower slightly. That new wall section could include a niche which would not be visible from outside the shower. I did that in my plan because I didn't want my shampoo, etc to be visible. My layout has the shower turned the other direction from what you show, with the door on the side where your vanity is. The wall facing the door has a 42" pony wall, which I added because I hate to clean glass. I think it looks fine, and it adds some privacy too.

Here's the inspiration picture that gave me the hidden niche idea.

Master Bathroom Renovation · More Info

I think 40" between the vanity and shower will be fine. I have my shower opening into a 48" wide area and it is fine. But you could also go a little less than 5' in that direction and increase the width a bit - maybe a 48 x 54 shower or something along those lines? I think 5' leaves wasted space, and would much rather have the extra width. Were you hoping to put a bench in the shower? Also, is the spacing between the sinks accurate? Would the vanity counter running next to the shower be wasted space? If so, maybe some storage there at that end? I'd cut that back if for no reason other than to avoid a seam.