I have thought about this several times myself. They would have had to hold the 5 player AT part till 3.2 but i think it would have made sense that way. It was the naxx grind, then the Uld grind. AT has turned Naxx 10 into a ghost yard. Some are still running Naxx 25...for some reason. I could see doing it to get to Saph and K/T but all the work it takes in a pug is not really worth it considering the gear is way better in a 5-man Heroic.

Of course there are exceptions and i know there are reasons to do some of the older stuff. It is a weird feeling though to look back on WotLK and how the progression has worked. I am not one to play alts and have a dk that I am VERY slowly leveling up. Amazes me to think that once i hit 80 on it how getting gear will be different than the first time around. I guess the game is getting extremely casual. I don't all together think that's a bad thing. I think it will be nice to be able to have some decent gear and a life too for many people. I have played the game for many years now and it doesn't pull me in like it used to. Under the old system, I wouldn't have the same chance to experience the end game the way I do now.