Terri was killed in a way that couldn't even be legally done to a dog or cat. That Florida law allows this prodcedure simply means they did not think through the frightful consequences of adopting it, as shown here, where it becomes easier for a woman to order herself killed than it would be for her to bequeath a $2.00 heirloom to a friend. Given the immense number of due process hurdles constructed by the courts to the painless execution of mass murderers, it seems the Federal courts could at least conclude, under the Fourteenth Amendment, that the judicial taking of life in this case by deliberate starvation and dehydration at least required the victim's advance written consent and proof beyond a reasonable doubt that she was in a PVS. The "deliberately inflamatory", and entirely accurate, term "judicial murder" stands.
So your only problem is a verbal request vs a written one (proof of PVS is required in either situation).
Cool. You're entitled to your opinion.
But let the duly elected representatives of the State of Florida carry out the will of the people and add the verbal request to the statute. Got a problem with states rights?
States can allow a verbal request for euthanasia but not a verbal request to pull the plug? Odd.