Not really.
1)have a custom column to mark Metadata is now Golden. Use a VL to exclude these titles, when working on metadata updates. (outa-sight...out-harms way)
2)Embed Golden metadata into the book. Allows recovery FROM the book. (the brown book icon in the MDE)
3)Backups for those

moments.
4)Plain old care. IMHO BULK (many books) operations are a chance to mess up and include a couple of wrong ones (those you did not want to change).
5)Use the content server for tasks where no changes are needed
6)A second batch of backups (different media and location)