After reading the update, I'm getting a really good picture about how this idea might look and work in practice. I can really see it relating to other topics - e.g. will planning, organ donation, power of attorney and so on. Modules on the system that hook into others' databases with permission? I like that you have catered for quick and easy preparation, or as complex as you like - and have taken into account differing levels of interest based on differing levels of health. I wonder if it would be possible to link it to govt health records so you get alerts if you forget to update it after being in hospital and so on. Great thinking, and all the best with your submission.
We have processes for recording wills, for deciding if we are organ donors, for nominating beneficiaries, for saving for a funeral - but when we fall ill, be it suddenly or slowly, it's difficult for others to know what we truly want - it's a subject we don't often talk about, a someday topic. So it's refreshing to see an idea that walks each of us at any stage in our lives through a process that helps us to articulate what we want and how.
I like the idea of it being systemised, so you can update it easily and give access to others like someone nominated as our enduring power of attorney.
I lost my mother and young sister in a car accident, but I do wonder what would have happened if my teenage sister had been on the edge of death in a hospital at 13 years old. I can see a further use for the tool/process because of this - it'd be great to know what the situation for dependants and minors would be as well if their primary caregiver died suddenly.
Certainly brainstorming during prototyping will flush out broader application of this idea.