The oppida were never entirely finished. It's an extreme amount of work to make the various states of damage and the animations between them, so we decided to take what we had at the time of the 1.0 release, which is the walls in pristine condition I think. Kailith did amazing work on them, but we have not heard anything more from him regarding the oppida since then; I don't think they will get any more states done. We are very grateful for what he did with them!