The problem is that doubling the amount of mobs or doubling the monster's HP isn't going to work when it comes to increasing the challenge. Difficulty doesn't just scale like that.

I mean, who knows, maybe they'll find a way. But I worry that the reality is that they're going to have a hard time making a more difficult game unless they take the painful step of nerfing the items and effects that *they themselves* inserted into the game.