Fappy said:Well, that makes perfect sense actually. Lore-wise, by killing Rom you have lifted the illusion that had been protecting the city from the true cosmic horror that is the Moon Presence. Without the illusion, the people of Yharnam see the truth which their mortal minds cannot handle, and thus amplifying their madness. It's not necessarily that the world became more dangerous... you just finally see how dangerous the world was all along.
I believe it was the violation of Kos' corpse(washed ashore in the fishing hamlet) by the Healing Church that caused the beast plague and this being the same Great One that granted Rom 'eyes' to prevent the red moon from rising. The Moon Presence just conceived the Hunter's Dream. Though it gets confusing with multiple dimensions overlapping and various people making contact with Great Ones.
Anyways while I don't think Bloodborne is extremely challenging(though the DLC and NG+ definitely turns it up a notch) I do find the challenge itself much more enjoyable due to a complete lack of frustrating moments that were fairly abundant in the Souls games(for example Capra Demon and Maneaters). I found a lot of the difficulty in Souls artificial due to frustration and tedium and Bloodborne was much more polished. Hopefully DkS3 will continue this trend.