I just spotted this over at the wow europe forums. There seems to be level 56-60 Elite Undead mobs on Purgation Isle after the patch 1.10—if you see anything unusual besides that, such as new boss mobs or new content, or quests involved feel free to submit news and screenshots. This change if true is not mentioned in the patch notes.
Tomas Hernandez is owner of Blizzplanet.com since 2003 posting news about World of Warcraft, StarCraft II, Diablo III, Hearthstone, Next-Gen MMO, Blizzard Careers, and the Warcraft film. Blizzplanet is a leading fansite covering news about upcoming Blizzard Entertainment licensed products. I also post previews and reviews. I have interviewed book writers and Blizzard game developers. I was previously an employee of the OGaming Network (2003), and IncGamers (2008-2010). I was a guest newsposter for GosuGamers (World of Warcraft) a few years ago and for Diablofans.com (formerly Diablo3.com)View all of Medievaldragon's posts.