the easiest thing to do right now would be to just remove the nests, get the lamps up, and get them out there.
You've got the winter to decide what to do next.
Well I was started the "remodel" of the Chicken Condo. It is freezing here...LOL 20 degrees outside.
This is where I'd definitely take aart's advice and wait until spring to make any bigger changes! The important thing is you have a nice structure that should do fine for the time being. Almost all of us make constant tweaks and changes to our coops over time... my coop page isn't up to date anymore and I posted it only 5 months ago.