You know what I think could be a cool horror plot for Starwars
So as we know Corscuant is made of thousands of layers, going from wealthy at the top, down to abandoned and downright horror show to the bottom. And at the lowest level, where the planet itself is, presumably support structures that hold up all the layers. And those structures likely aren't uniform, and probably haven't received any maintenance in hundreds to maybe thousands of years.
What if those support structures started collapsing, making the thousands of levels it supported collapse with it. Layers that haven't seen light in ages. It's like a sinkhole that opens a path between Hell itself and the world above. So now, either a crew must be sent down to repair the supports, or evacuation of Corscuant must be abandoned as the city planet continues collapsing.