I'd want to fix a couple of things about your coop. The hardware cloth isn't secured well enough, and should extend all the way to the wall everywhere. If it's all improved already, that's good, but otherwise make improvements there.
It will be easy to scrape bedding out without having a board across the doorways, but bedding will stay in the coop better, so you can make it deeper, if there's a 4" to 5" high lip there.
Are those the same roosts they have in their old coop? Have you tried saplings or tree branches?
Window openings on the south side, with hardware cloth, and plastic in winter?
It's a very nice coop!
Mary