I would like to see an option to copy all contents of a folder to a mailbox using Archive Explorer or the Admin console in Enterprise Vault.  I had a user delete an Archive folder with thousands of shortcuts organized into hundreds of subfolders.  The only way to recreate the mailbox shortcuts are referenced in the following tech article.     Options 2&3 have the potential for data loss since you are deleting the original items upon export otherwise you are left with duplicate items.  Option 4 is the only option without "Brick Level" mailbox restoral that will recreate the items using the existing properties in the Archive.