Resta said:
.... curve of stucco moulding doesn't fit windows arch.....
Just curious. Do you mean the small horizontal band to the left and right? The slight eyebrow arch, not enough radius?
We install quite a bit of decorative stucco mouldings. Not my design, but enormous sills, fluted trim, 12 in plus crown. I like stucco bands, etc. , seems like some HO just want the biggest, loudest look at me trim, instead of just an accent, detail.
To the OP, the drawing looks pretty straightforward. Proper WRB, drainage, flashing need to be in proper order. Looks like a big door in a stucco wall, with vertical siding.