I like KSE. They're not the greatest band ever and will never be close to that but I don't see how they're killing metal. Is it becasue they're last 2 albums have gone gold? They way I see it is any metal band that can sell well is a positive thing for the genre it'll cause more people to get into metal overall. The lyrics are little more pussy on the new one but I fail to see how that alone is killing anything in metal. I'm sure there are plenty of metal bands out there who suck way more at it. I do think their cover of Holy Diver is bad though but i'm also a big Dio fan.
I still think it's funny that Manson is the headliner yet most of the reviews I've read everyone is leaving after Slayer who should be the headliner anyways.