Hehe. Yeah, you have to be open to discover the city. It can turn out really surprisingly. Happy to hear you managed to make Ex Novo work for a space station! We did some cyberpunk and sci-fi colony tests on our end and found that it works really well. Something as constrained as a space station might be tricky, but good job!
As for the rules: Yeah, removing the landmark does not remove the faction. It may have story consequences tho as these factions have no "headquarter" anymore. Also change something generally refers to district/resource/landmark but to be honest, that was perfectly fine!
Thanks for sharing!