I am a bit torn about whether “grievous and irremediable”, that language on its own, is sufficient. I don't fault the drafters of the legislation for trying to put some more meat on the bones, so to speak, and be more specific about what that means and provide some guidance. I would say that to the extent it requires an incurable illness or condition, I would interpret that in line with the Supreme Court's decision in Carter in terms of incurable to the extent that any treatment is not tolerable or acceptable to the individual in the particular circumstances.
I think the effort of trying to define grievous and irremediable is probably a valuable one, but as I said, the biggest problem I see is with the reasonable foreseeability requirement.