Is A Machine For Pigs best suited to a 'mature' audience?

[Nyarlathotep]

Really? Where did you get that from? I'm just wondering so I could have a point of reference. Because if that's the case, that would be really weird.

If that's what They've wanted all a long Why wasn't TDD like MFP in the first place?

Here's the image that shows at the start of The Dark Descent, the first time you launch it. Which I think makes their intentions clear.

I don't know the details of why the resource mechanics and such were left in. But my guess is that it's just leftover design ideas that they didn't feel comfortable removing. Especially due to how close they were to not releasing the game at all. In a retrospective, Thomas Grip talked about the shallowness of TDD being a regret. In how he wants their games to push deeper and more thought provoking stories and themes.

http://frictionalgames.blogspot.com/ and here's where they talk about all of this stuff. I can't name which entries right off hand. But I remember reading the information clearly enough. Regarding their thoughts on The Chinese Room's work, etc.