In what way is it a failure?
I wouldn't say that the raid cannot be done with melee.I think the problem people in the game run into is that these WF races often skew the minds of most (lesser skilled) raid leaders.It's the same problem Mythic + has right now because of the MDI.People watch these top in the world players stream and they think"Oh they brought 2 outlaw rogues, a monk, resto druid and a prot warrior so that's what I need to get to push high keys too." or "Oh they brought 10 affliction warlocks 5 shadow priests an ele shaman and havoc DH so that's what I need to do this raid."People see the meta's and they think it cannot be done without the meta.I do almost wish WF races would stop streaming because of it. But they found a way to make money so they will continue to stream.
For some reason you guys are conflating what Method is doing and saying that all guilds are doing this. My guild did Heroic first night with 1 shaman and 1 warlock. This raid is a lot of fun for a mini raid.
I miss the times when DKs were actually a viable raid pick, not a meme class that brings nothing and its just better to bring a ranged class.