Hi Damocles, great work on the sliders feature. That said, I'm encountering an issue that I haven't seen since 467; sometimes a world gen will fail and all that'll be generated is biomes.png, genHM.png, radiation.png, and main.ttw; a preview subfolder is generated but is empty. I've been trying to debug and pinpoint what setting or combination of settings causes this, but so far it's been inconsistent. I'll attach the last config I tried. I've replaced my prefabslist with a compopack 40 one, but that doesn't seem to be the issue as with default settings worldgen works fine. Good luck.
Edit: finally found it! Seems to be related to the "no POIs in biome" setting. That seems to break it in conjunction with some other settings, unsure which precisely.