Originally Posted by
Gondlem
If you haven't done heroic raiding in minimal gear, you really shouldn't bother commenting on how hard or easy it is. The difficulty of raiding isn't in the raw mechanics in the sense that you have to be highly skilled to avoid dying to something, it's in discipline, in the sense that you have to concentrate for 8-12 minutes on multiple things without making mistakes, adapt to new situations on the fly while continuing to do what you were already doing etc. Dodging Anima Font on Heroic Animus is fairly easy, but 25 people dodging Anima Font for 6 minutes while maintaining good throughput, micromanaging add positioning, using CDs for jolt etc is a good deal harder.
Ask anyone who has raided consistently since Vanilla/TBC at somewhere near the high end (ie not someone who quit during level 80 Naxx and has been casual since) and they will tell you that from a mechanics/strat standpoint raiding is as hard or harder today than it ever has been. You have to be pretty good to be in a top guild.