We will be insulating it, putting in two 24 by 24 windows, it has vents in the loft area, it will be going under trees that shade the yard from the West, it the house will block from the east, and trees from the South.The thing about metal coops is the temperature issues. It gets very very hot, it gets very very cold. Both of those, unless you have some sincere ventilation, can be the cause of heat stroke or frostbite and respiratory issues.
If you are going to use a metal building, you need lots and lots and lots of ventilation. Since chicken breath and poo gives off so much moisture, you have to have the ventilation to get it out of the coop. If you don't, you get condensation and wet birds. Wet birds are not good in the winter.
In the summer, it gets like an oven. Every surface you touch is burning hot. Even at night when temps are cooler, you can end up with chickens having heat issues.
To combat the design issues, you can insulate parts of it, add lots of ventilation in a flow pattern for your interior lay out, grow climbing vines over it, plant shade trees around it, use water for evaporative cooling in the summer.