Blizzard have confirmed there will be no changes to the World section of the Great Vault!
Hello!
We’d like to make it very clear that we’ve never planned to change the Vault requirements for Delves in Season 2. They will unlock with 2/4/8 Delve completions.
We intend to keep the Season 2 Vault requirements the same as they were in Season 1, for all content types.
Thank you for the feedback!