A few weeks ago our 25-man raid had a few wipes to Sartharion + 3 Drakes. This is the fight where you have to stay out of Shadow Fissures (a circle of pain on the ground), move between Lava Waves (walls of pain on your sides), avoid Fire elemental Adds (pain around your ankles) and Whelp Adds (pain around your head), just to name a few.
Needless to say we had a few people that had trouble with all that was going on. Eventually our raid leader gave a warning if they didn't shape up (quit dying to stuff) they'd be replaced. Eventually two people were close to the chopping block and as I recall at least one person was replaced.
Later on I found out the person replaced ended up quitting the game. And one of the other players decided to quit raiding. Neither of them gave what happened in the raid as the primary reason. But it seemed obvious to me.
Today on the official forums there was a thread made by someone who said their guild would quit the game if Ulduar turned out to be too easy. I wonder why they haven't quit already. If it was that easy I assume they were done with current content a long time ago.
We want the game to be all things. Too hard so winners can be set apart from the losers, and too easy to keep from having to split up friends and family.
9 hours ago