Blizzard brought back hundreds of items that were removed with the Cataclysm world overhaul in Patch 10.1.7 and the community has compiled a spreadsheet with all the removed items.
As mentioned in the official Patch 10.1.7 notes, the patch brings many items that were removed as a result of the world update in Cataclysm.
(Source)
ITEMS
Hundreds of zone drops and rare spawn drops lost to the Cataclysm have been faithfully (or near-faithfully) restored. Good luck on your transmog hunts!
If you are an avid transmog hunter, you will probably appreciate the following spreadsheet from the ATT Discord with all the readded items.
