This is a really fun concept both in theory and practice, and it's a fun balance needing to micromanage the characters' health, actions and stress. Although I would like to say it's REALLY easy to accidentally make a character mad if you're not careful... especially when the heroes can give you some... strange prompts sometimes.
"Ah yes, hero, let's give me THREE healing prompts while MY WHOLE PARTY IS AT FULL HEALTH"