IMO a coop that has lots enough room in the winter for 11 chickens to play and not get cabin fever, is much to large for 11 chickens in the summer. Then again many people have smaller flocks in the winter compared to their summer flock size.
Agreed. I thought my hen shed was great until winter came in. In the summer they go outside and they aren't usually even confined in the 20x20. The 20x20 is just for times that I need to confine them like when I need to vary things during a heavy hawk infestation or when I go away and have someone else tending the chickens they stay in the run also.
It's hard to envision winter when you have a wonderful summer situation with birds freely roaming with lots of space and only using the house to lay an egg and sleep at night. But when the winter comes in you're sure glad you have more space!