Caldera/Sludgenest/Conclave vaults (and Scoure Pits in Forbidden Cults) are...

Caldera/Sludgenest/Conclave vaults (and Scoure Pits in Forbidden Cults) are now mutualy exclusive, only one will exist per game. But one will always exist. In addition the racial 100% chance will only exist until the relevant unlock is gained