One of the things I love about the SIFRP system is the way that intrigues use the same underlying system as combat, so that all actions can be resolved with a consistent level of detail and fighting isn't privileged. (Designers of D&D 4e's badly-broken "Skill Challenge" rules, eat your hearts out.)
That said, I do wonder about one inconsistency: characters in a fight have a choice between taking Wounds (-1D per) or Injuries (-1 per) to mitigate Health losses, but characters in an Intrigue can only take Frustrations (-1D per) to mitigate Composure losses.
I'd be tempted to add Setbacks (-1 per, absorbs Composure loss equal to Will, take no more than Will) so that intrigue offers the same options as combat. I thought I'd post this here, though, rather than the House Rules thread, to get feedback: maybe there's a good reason not to offer this option?