I wish my main coop was bigger also, its 10x16. It didn't take long to acquire the 30 standards and thats about all that fit in it. So we will be adding on next Spring.
I also wish I had one big long barn/coop with sections for ducks, juvies, bantams and whatever else, with separate runs out the back. I have 3 coops now, one for Bantams, one for Standards w/ a section for juvies and a brooder in it and a duck coop. Takes much longer to get everyone water, lock them up at night and clean them all than it would if they were all in one building. A building that had running water to it!
I would have covered the runs and slanted the ground so the water ran off better. I am a little worried about snow and ice pulling down the netting over the run this winter.