As much as I would like to see some challenge come back into the general play, Its probably gonna take a major shift in design philosophy for it to happen.

As overall the more I have looked at things, the more it seems like there isn't the depth and/or complexity in the game to really allow for difficult content. It comes down to if the difficulty is seen as challenging or punishing. And so far, most of the more difficult content trends to the punishing side instead of the challenging side. Challenging games are usually quite fun, punishing games get shelfed in a hurry.