Things that would have made Amnesia scarier

[Clord]

AI Director (AI Horror Director). Those who know about L4D and L4D2 probably knows about feature like that. It basically analyzes your performance and customizes experience for you and your party.

It would make cool New Game+ DLC. Basically when player has no oil quite while, AI Director places some oil to nearby "node" what player has not yet seen. Also from not spending your Tinderboxes and Oil would make AI Director not to give you any (which would obviously turn out that player crashes to scary place and finds itself running out of stuff).

Player makes quite progress and has not indicated being actually scared quite while, he enters to room and suddenly AI Director decides that it is time to pull something off like. Placing monster behind still not opened door and making it break it down and searching the room. There could be even minor chance that monster sometimes discovers your hiding place to make player run. Also make it so that sometimes it is just hallucination.

Also it would not be odd if Alexander would have some guards in the late parts of the game what are not so human. Like undead Dogs, Birds and more made by using his method to do the Servants.