We are indeed planing on upgrading the buildings. First opening them up if possible and pimping the visual quality first. Adding interiours would we the follow up step then. The hardest part of this sadly is, finding people who have the experinece and will to take on this task. We are looking for 3D artists that want to join in for quite some time now, but there are not many around.
I hope this answers your question. If you know guys who want to help out, maybe even you, join our discord and lets have a chat.