Removed stuff in Amnesia?

[Googolplex]

As we can see in the scary gameplay trailer, there was stuff in the game that has been removed.
In the entrance hall, there was a water pool and that is not in the retail game. And behind the door, when you goes the stair down is an other level than in the final version.
There you can move the table in front of the door to protect the come-in of the monster. I have never seen that place and I loved it because that was scary!

And why you can't hear the woman screaming in the darkness?
I have hear it one time in the entrance hall and then no more.


Why all the great stuff was removed or changed?