Nice job! Really nice job!!!
Mine is very similar with an A-frame coop on the top.
The only thing I've had to add is a bit of clear plastic around the run at the bottom over the winter (keeps the run warmer, less snow blows in, and less windy...yet clear plastic allows sunlight through...I covered only two sides so that they still get plenty of fresh air). And I've tried to let the girls out in the yard as much as possible when I can. I've noticed with the coop overhead they don't get a lot of direct sunlight. And I believe (as a biochemist) that vitamin D has a lot more to do with egg laying and general health than we realize.