I'm gonna have to agree with the "Everyone's seeing illidan is bullshit" bit...I'm in a guild who FARMS him and I'm not allowed anywhere near him because I don't have the gear to handle it. Most BT fights require a minimum of gear and dps totals and some Hyjal fights are particularly dependant on SMART players paying attention and any guild who's been stuck on SSC/TK too long is not attentive enough overall to do so, period. DA wasn't and I will openly say that because it's the truth;(Most, not all, simply didn't pay attention to the fight around them, just warnings that were often broken instead of thinking on their own) DC is attentive, noone needs to sit around explaining shit for 20mins or doing 5-6 ready checks or random afks, shit goes in, shit goes down, shit gets looted and we're done with 5 bosses in 2hours. And despite their t6+ gear + attentiveness and skill, some of the fights are close shaves.
I personally haven't seen Illidan, nor will I unless they decide to go back and get me a t5 set for the 4piece bonus to make my dps competitive :p Just becuase attunements are gone doesn't mean player stupidity is gone too. Just cuz you can start ssc/tk(Loot Reaver is called that for a reason) doesn't mean you can handle jack shit in the new instances you're allowed into :p