Hey, thanks for the interest in our game. You are totally right in saying it looks like Cthulhu mixed with Mork Borg. MB is a big inspiration with its streamlined, rules-light system. We wanted to apply that design philosophy to the mystery genre. It is a pet peeve of mine that mystery games tend to get bogged down in mechanical minutiae when they don't have to be.
Let me try and address your questions: The fragility of your Investigators is very real and something the team will have to play around. There is a sanity system. In WOS we call it Insight, and it is a dual-sided stat that both helps and hinders you.
I have been meaning to do a flip-through of the book for anyone to watch and get a better idea of the game. I am sure we can work something out if you are intrigued by the game. You are welcome to reach out: deathcapstories@gmail.com