The removal of attunements opened up The Eye of Tempest Keep to our guild. We managed to kill the "easy" boss - Void Reaver and I think it gave our guild a little boost.
We had reached the point where we had the first boss in Serpentshrine Cavern causing us trouble, and beating your head against a boss lowers morale after a while. So it was good timing that VR was made available to us recently.
When we defeated VR there wasn't that feeling of "YES! We finally got him!" because it really didn't take long, but bosses like that help raiding I think.
Having easy bosses are just like quests and rewards and new levels - carrots that keep you playing. Or as some call them loot pinatas. Gives you just enough motivation to go beat your head against other bosses again.
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