Ive finally played Amensia. Heres my Review (plus Penumbra comparisons)

[Brennenburg]

I agree with 9 out of 10 and I also agree on how you said that once you hide in a cupboard or whatever the monster just delete off the level once they walk away from you. I wish in Amnesia the castle was like a persistent world where even the grunts back in the refinery could still come down to the inner sanctum(Not sure how you would go about recognising them individually because they all look the same).

Then there is the puzzles, well as you said it would be nice if they were more complex as the ones in Penumbra but whatever. I still really like Amnesia as one of my most favourite games of all time.