VisCal is so unfathomably cool. I wish there were more instances of it. Then again I'm currently playing a character who has it maxed out at 2, so I guess being too reliant on it would be hard to balance for players who don't spec into it.
On that not this reminded me about how on my first run I assumed the hanged man was just one of many cases you'd slove. But in retrospect it was fleshed out enough to fill a whole game so that's nice