Again without anything to go on OEGB seems like a good bet especially since it TSC and they provide more common breeds. Most of my girls are bantams because of the very reason you mentioned. I wish you luck but I would say start planning a new coop 😂.
The coop looks pretty funky and fun. The lights are great. I do like that you included how you keep the coop warm in colder months but as said before it's lacking more structural details.
The coop itself is good. I love the fact that the bunny anc chickens co-exist in one space. It would really be help if the design and framing was explained.
The coop seems like the basic of needs are met. The "ladder" also doesn't seem very practical. Other than that there are no directions which is not helpful.