The Cata week was an adventure in hilarious disaster due to the dungeons actually needing coordination, but the BC/Wrath weeks have always been pretty much faceroll. The only tricky parts of the BC week are some of the spots in Mana Tombs (silences/polymorphs) and similar spots in Arcatraz. In all the times I've done them, I've only ever had one wipefest, and that was in an Arcatraz where the tank had no idea what they were doing and went around pulling whole rooms at once, including bosses.
Sounds like you just had bad luck, honestly.