Crygil has added to the list of in-game fixes, and the most recent include increases to stats on three items to reflect their item levels. Here are the fixes straight from Crygil's post:

• The tentacle creatures and floating skulls in Yogg Saron’s brain rooms should now load faster.
• The following items have had their stats increased to properly reflect their item level: Earthshaper, Valorous Siegebreaker Shoulderplates, and Conqueror’s Siegebreaker Shoulderplates.
• The Leviathan’s Coil ring has had its armor reduced from 882 to 448 to properly reflect the item level.