The dtrace of the ArchiveTask process contains 'Setting CreateShortcut and DeleteOriginal flags to FALSE for the Draft item' regardless the policy settings like
'Delete original item after archiving' set to True
'Create shortcut to archived item after archiving' set to False

and 'Archive draft items' to On

Starting with Enterprise Vault 12.5.2, the draft items are wrongly considered with the flags 'CreateShortcut' and 'DeleteOriginal' to False
This issue has been resolved in the following release:
Enterprise Vault 14.1.3 available for download here.