Would be nice if the people writing these OpEds actually knew what they were talking about. Anyone who has played WotLK knows Blizzard stopped catering to hardcore players a long time ago. In fact one of the primary focuses of WotLK was to cater to the non-hardcore, so that even the casual players that don't have the time to raid 24/7 can experience all of the games content.
I'd guess you're a hardcore player, right? Because that sort of player is the only sort that seems to believe that just because you can complete a raid dungeon after running it every week for a month or two that it's too easy. A casual player is not going to see the end of Ulduar; they aren't even going to see all of Naxxramas or Malygos unless they have more hardcore people to run them through it.
Casual players don't schedule out four hour stints to sit and run through an instance. They don't plan their week around playing a video game like you need to in order to be a successful raider, even in the "more casual" Wrath expansion. The game is so raid based that you have to schedule long periods to game, or at the very least a few hours of time on multiple days of the week.
And it's not just raiding, because you need to do that in order to get gear to compete at a level where you'll get decent rewards in the PvP aspects of the game as well.
The game -isn't- more casual friendly just because the raids are easier than they were in previous expansions. There's less to do in Wrath if you're not a raider than there ever has been leading up to this point in WoW, and it's starting to show.