Really great open air build appropriate for a hot climate, and proof that a coop does not need to be a tightly enclosed box, nor does a coop have to be a distinct and separate unit from the run. It's simple but does the job of providing shelter and protection from the elements and predators. Having the hardware cloth outside the plywood enclosure was a smart choice - yes it cost a little extra, but as you noted it added extra security and made it possible to have the walls not fit seamlessly together.