Why remove the trailer scenes?

[Cuyir]

I encountered the area under the stairs and was scared shitless that the monster would come barreling my way if I opened the door. I was instead greeted to the monster running away outside when opening the door.

Spoiler below!

The scene with the cages was also drastically changed. It seems that the area with the centrifuge was merged with the cellar area under the church, the cages and encounter with the Wretch for the sake of the trailer. Or the sections were split up in development later on.

I was there and recognized the area and what did I do?

>Took the slab of wood off the door

>Lantern freaked and I heard a sound

>dropped EVERYTHING and sprinted under the stairs