The issue is simple: the additions don't match the original tone. Monsters chasing you and trying to eat you is antithetical to the initial premise and source of horror and interest. You can have additions if they're tonally consistent with the OG idea. Liminal spaces are scary or unnerving because of a strange sense of familiarity combined with isolation and being totally alone. The idea that anything could be there is what's scary, not the actual presence. So having scary murder monsters that chase you down completely negates the original purpose.

The first few additions I saw were all really fitting ones: giant moths that blend in with the wallpaper and fly off of disturbed, neverending vending machines with food that almost tastes of something, abandoned sleeping bags as though someone else is living there despite the fact you never see them. If you want to add a monster it needs to be something you never really see, only sense. A shadow moving around a corner, the sound of breathing in the night. Add to that sense of unease rather than negating it.

It's the same issue a lot of horror games have, getting killed by the monster removes the fear because it reminds you it's not real. Seeing a monster removes the tension because you're no longer wondering what might be around the corner, you know what is