That coop won't hold the number of chickens that there's nest boxes for. Really it's ok to just leave half of them off, or use the space for storage instead.
Depends on their wind direction, but that's part of the reason I suggested extending the overhang, to help buffer winds through those openings. I have my top roost directly between 2 windows and the birds fight over the window spots.
I'd think about adding ventilation above the human door, with that nice overhang, and maybe remove it from one of the sides, depending on your wind directions OR extend the overhang on the sides to provide more protection to those vents. Otherwise it looks fine? I'd also turn one bank of nests...