Lovely game.
I find that as the Mastermind you need to practice each scenario before running them. Just to be sure not to make overtly dumb mistakes. Although that may be mostly my thing.
I have a very difficult time keeping quiet ever, even when games like The Grizzled, or Escape: The Curse of the Temple force me to be with in-game effects. However, for Tragedy Looper I can see it enhancing the experience.