It's because, as with everything in life, people learned how to deal with this new challenge. It doesn't mean it isn't hard or challenging. Go take a team full of newbies who've never done a raid before or seen a video walkthrough through CE if you want a challenge. I just really -blam!-ing hope they don't ramp the difficult by implementing some bogus crap like extending boomer range or randomizing sword duty based on feedback. It's already bad enough that they randomize the team that gets tped in VoG when originally anyone could choose who went.