That's ture, you got your nurses and doctors, your grey children, mumblers and larval stalkers, groaners and wormheads, and air screamers and night flutters. I like that variation. SH3 kinda did that too with like darker versions of the monsters covered in like, crawling darkness. It's something the series has almost lost.

I earlier posted an idea of letting Gum Heads steal as many items as possible, then be a witness to the grueling sight of all the stolen possessions in one room at B1 (where they have been set to spawn).

Today I began by letting one steal 11 Holy Candles from me. Seems no more than three items can appear in the B1 room at the same time, the rest go into a queue (and more items can be spawned by leaving the room and returning). I haven't yet tried if anything interesting happens once you get all the 30 something stealable items into the queue.