The mod is cool but it'd be definitely cooler if we can have a z-level patch that:
1. reverse any change radworld does to the planet generation;
2. the underground level made by z-level will use the map gen. from radworld with reasonable ramdomness (e.g. using the seed of the save to determine which cavern "biome" should be generated underground).
3. make underground levels radiation free when it is below level [customizable number].
unpopular opinion: different caverns being biomes is both unimmersive and dumb. Especially when they cover 30-40% of the planet.