The "difficulty" people are talking about isn't 1000hp zombies; it's the complexity of the game. Meta-difficulty.
Removing things like sticks, or bear meat; requiring you to convert hides to leather before you can use the leather; city biomes packed with cops and dogs.
These aren't difficulties you can change in the options menu. They are difficulties that come from game design mechanics, which force the player to make decisions about how to spend their resources and energy.
That's what's been taken away. Contrary to what MM believes, simplicity in a game is NOT always a good thing.
-A