Karazhan isn't exactly cutting edge content. It's had a few nerfs in its time. That being said, walking into Medivh's home-away-from-evil with a collection of random alts, sightseers, and new-to-raiders can sometimes prove interesting. And by interesting, I mean "repair bill" and "love of all that's Holy, just kill the dang flares!"
Last night was one of those nights. My Guild has spent the last few weeks helping folks prepare for 25-man raiding in Wrath. The gear from Karazhan won't be applicable in the expansion, sure, but the skills and habits you learn now will help you be successful in the future. We had some particularly green folks with us, and while we knew the changes from 3.0.2 would make it easier, we weren't quite aware how easy.
We were breezing along. Who doesn't breeze past Attumen, Maiden, and even Opera? When we hit Curator, we started to really feel the difference. The chap barely made it to his first Evocation. We skipped on past, slapped Aran around, and went up to Prince.
Prince got down two infernals before dying. Confused, I checked the raid's gear. Had our all-in-greens Rogue somehow been replaced with a Warglaive-wielding maniac? Did the new specs really make that much difference?
And then we recalled -- every raid mob in the Burning Crusade got nerfed. So, now, for the next few weeks, we have an odd nirvana in which to help folks learn to raid.