After seeing how easily classic was cleared, if blizz decided to re-release each xpac, which one would you consider would offer some challenge ? Where would you draw the line at where we might need a few hundred pull for an average guild to clean ?
Personaly, i'd feel that appart from some very secific fight (yogg 0, maybe arthas, kt , kj ?), it was cataclysm that really brought the game in a new level of complexity. I dont see guilds getting rid of sinestra, chogall, nefa, ragnaros, etc as easily as they would dispose of the hardest challenge from previous xpansion.
Thoughts ?