Progression and persistence

For me an ideal raid endgame would start with a dungeon that is relatively easy, and then get progressively harder with each following dungeon. As a consequence, players and guilds would spread out, with the best players advancing fastest, and the least good progressing very slowly, and that mostly through the inevitable gear accumulation. And all these raid dungeons would remain as they are throughout the expansion.Blizzard's idea in Cataclysm appears to be to have a "current" dungeon set which

World of Warkraft...