So much in agreement. Nearly everyone complaining about the ease of the game will usually admit (eventually) that they haven't done everything the game has to offer in terms of challenge. And quite often they've not played in quite some time either, and thus have no actual frame of reference.
Very few players capable of doing the very hardest content under the most difficult conditions (example: world first raiders) will say the game is easy. They might complain there's nothing left to do after they've completed that content, but calling it easy even for them is just ridiculous.
---------- Post added 2013-06-27 at 09:22 AM ----------
Well we'd still have some hard content right at the end, but there wouldn't be very much of it. The current model is great in the fact there's extremely difficult end-game content in every tier now. Reducing (aka dumbing down - how ironic!) it down to a single difficulty wouldn't solve anything - it would mean most of the content is too easy for the heroic raiders and most of the content is too hard for the very casual players.