I have build a utility that, when applied to a copy of Bloodborne v1.09 (the latest update), will modify the game engine in a way that allows most of the gameplay logic to run at arbitrary update speeds, increases the framerate cap to 60fps, and optionally lowers the rendering resolution to 1280x720.
Please be sure to decrypt your eboot.bin and if needed, "un-sELF" it as well. The file when viewed in a hex editor should start with "ELF" and be exactly 93667641 bytes in size.
You can download this utility from here: https://manfightdragon.com/60fpspatch.zip
I am not providing instructions for how to make backup copies of Bloodborne, or how to run a backup copy of your game on your console. These things are well documented online.
Please enjoy it.