In all honesty i feel that the flashpoints, as well as with some aspects of the game, have great potential, although are lacking when it comes to difficulty, and mechanics. As i have only gotten up to athiss, i dont know if i could stand for everyone, but i personally felt that the bosses, could use a boost when it came to damage dealt or if anything the things they did.
A great example of this is the last boss in Athiss, THe Prophet of Vodal. In all honesty, he had some nice varied mechanics for a lower end boss, but they were so easy that it took out any real excitement in the encounter. The flames he shoots out from both sides of the room, slow, and piss easy to avoid, and the damage nominal at best. His "lightning stun",although at first a surprise, it quickly becomes more of a nuisance then a threat when it only targets the tank and barely does any damage. THe only real interesting bit to the encounter was the random force attack he does on a target, which did enough damage to atleast keep the healer busy.
All it would take would be a simple increase to the damage of the Prophets abilities, and perhaps making it so that the mechanics of the fight make it so that all members of the party have to be on their toes and not just the healer. For instance making it so that the flames would move faster from each side, or have it so that the lightning stun he did affected more people than just the tank.
Although i can understand that you may be catering to new players, please remember that many of us have come from games that we've felt have been to easy, or dummed so that down lower end players could grasp it easier, i understand your caution, but this caution may make it so that you lose many individuals who find interest in your game and the potential it has.
So let me get this straight, you QQ about Cata being hard at launch, and now that people find this game to easy you tell them not too voice their own opinions of the matter If you are not a hypocrite than i dont know what is