You could probably recover some of that wasted 'nesting box' space by putting sturdy rubbermaid-type totes with lids in those slots. You could store your poultry first aid kit in one, chick feed in another, all flock type feed in a third, and assorted goods such as extra oyster shell or ground egg shell, treats, toys (Yeah, I said toys) etc in another. You'd have access to the totes from the outside of the coop too.
It's a tiny coop, I'd say it's suitable for four to six, depending upon breed.
It's a tiny coop, I'd say it's suitable for four to six, depending upon breed.