Care to explain how a response from Blizzard 21 hours ago is old? Perhaps I’ll just link you directly to Kaivax’s post, Great Vault bugged? - #3 by Kaivax.
What else are they suppose to be responding to? They identified the issue was a UI bug, nothing more. I don’t understand what it is you don’t grok here and why you think there is more to be done wrt the Vault.