It will need some thoughtful tuning vis a vis infiltrators. We don't want to turn 60+ year old characters into fish in a barrel (though at the high end of the age range, it should start to get pretty hard to escape death). Some islands, especially the stable ones, have a large supply of very highly trained infiltrators; if the mortality formula is too aggressive, a lot of people will start getting stabbed to death.
It goes beyond that. If you open up actual death to anyone from infiltrators, an infiltrator caught attempting an assassination is immediate fair game for death themselves. Hell, if they're caught badly enough they should die in the attempt.
That said, I'd be open to the idea that people in Council positions and Dukes be fair game for death. I might rethink Gregor's taking the Judgeship some if only because he's by far my most favorite character behind Boeth and Giselle.
