The dream of Mythic is basically dead... Frost Interview with Yoshida

[Arohk]

because a single player playing poorly will not necessarily wipe the run.

Uhm, pretty much that what happens in Savage raids, one player can do a small mistake and it is a wipe, people who don't want difficult content will avoid it anyway.

I am personally not a fan of World of Warcrafts Mythic+ system, I despise it, but that has less to do with the difficulty curve but how it is implemented.