Assuming the height is there, I'd move the side door to the back, rather than the front corner where its currently located.  Open Out, not in - you can always place an overhang to offer weather protection.  Reduce the number of nesting boxes, you need 1 per four or five hens - the remaining space in your shed doesn't have the square footage to comfortably support more than (guessing at the overal dimensions here) 10 birds, possibly fewer.  Three boxes is enough.
Place the boxes on the wall at a height where you can access them from the side, not the top, while you have good visibility - that's probably between 46 and 50" to the middle of the nesting box.  Now you don't need space above them for a hinge, so you get that wall spacve back above the boxes.  Food can be stored underneath.  A couple 40# or 50# bags will stand upright under the nest boxes, and not intrude into the walking area, making it feel more roomy.
BRB - going to measure to the middle of mine - my wife can see in them easily too, she's short (ish), while I'm 5'10" on a good posture day (rarely), so it should give you a strarting point to find what works best for you.   
/edit - middle of my nesting boxes are 55" in elevation.  The boxes themselves are 12" deep, 16" tall, and either 14" or 16" wide (some of each)
If you do put a window in the wall, just mount a piece of plexiglass (wider, rather than taller).  Doesn't need to be thick, or framed pretty, just needs to let you see in.  Of course, you again give up wall space doing that.
and looks like you are running electric?  I'll assume you are competent to do  - its not difficult, after all.  I'd mount your disconnect on the inside, likely bringing service up the wall you are builing, and place it next to the nesting boxes, in the space where one of the boxes you are removing is currently located.  Remove the outside light fixture, and relocate it as a shallow LED under the eaves, where its weather protected and less visible.  Unless you plan to pull permits and get an inspection, likely better you don't flaunt your work to any who might care.
Have you given thought to adding a back gutter, rain catch, and gravity fed watering system???
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