On behalf of everyone at Ghost Ship Games; Cheers in your tears!
What's the selection process for deep dives at GSG? You just generate a bunch of seeds and look through the maps until you find some weird ones?
Nope, it's random every week without any filtering on our end. When we do an update, we usually make sure the two deep dives have the new content in them as much as it is possible. For the new mission types in the previous updates, we generated seeds until we found one, and then set those seeds for the first week. Same with the biomes, but that is the extent of us tinkering with the weekly deep dives.