That's kinda how the multiplayer killboard on CIC is set up. There's kills, deaths, and ejects. I think I would need something like that, considering there's some missions I never beat the first time (the Gwenhyvar and the last SO1 mission with the double Fralthras come to mind). Kills could add to an overall score, while dying takes away from it (maybe?)When I get my new PC set up in a month, I'm well up for this.
Perhaps instead of not being allowed to die, we also post up how many times we died. Restarting a mission due to failing objectives could count as a death.