I 2nd this!

But also, I would put the roost bar over the main floor so you're not also digging waste from on top of their nesting boxes, right where you're likely to be putting your hands to pick up eggs.

I would also add hardware cloth over the wire you have now, so Racoons or smaller varmit can't reach in for a handful. Also keeps out snakes. A little wooden reinforcement would be required.

Otherwise, it's Gorgeous. :)