When I first heard that Kael'thas Sunstrider, the Lord of the Blood Elves, was going to make an appearance in a heroic 5-man in 2.4, I nearly wet myself. At the time, I had never ventured into Tempest Keep and only heard epic stories and lore about one of the fiercest personalities in all of WoW. I was very eager to get into Heroic MagT asap to witness the grandeur of Kael'thas first-hand... that is, until I heard that the encounter doesn't do him any justice whatsoever, is incredibly easy, and to some, even tarnishes the image of the once-great Blood Elf.
At first, I thought the complaints were coming from a few overly-passionate RPers who were disappointed that Kael'thas was tweaked down into 5-man form. However, after talking with a good number of players, who definitely don't RP, btw, I'm beginning to think that there may be some truth to this story after all.
This YouTube video shows a Holy Priest solo'ing the once-mighty raid boss from about 40% down to nothing -- definitely not something I would expect a single player could do against a character of Kael'thas's caliber:
Gimmicky slogans and music aside, the video is a great example of Kael'thas's level of ease that people are describing.
Looking at it myself, I can't help but believe that there is definitely something worth complaining about.