i'm more sure that a lot of person saying that the actual content is hard will do bad with true challenge. scripted fight strips down the challenge...sorry but that a fact. repeat a pattern is not hard, what it's hard tough it's get 8 person repeat this pattern together.
great news, it's not team play, it's not even mmorpg fight!!! that not without reason that a lot of person point this. it's because we don't have a high level challenging content, indeed you can make a few fight with this sort of scripted fight, but not all!
and yes, put one shoot mechanic on almost every skill of a boss it's an artifical way to increase the difficulty.

ps: what it's scary it's the fact that people simply don't notice that when they go check a video of a fight... almost all the video, make by different person look the same... it's like you look the same fight! gosh we are not machine but human!