Physician assisted suicide is a super slippery slope. I'm stunned when thinking people advocate.
It works very well in countries such as the Netherlands, I've seen that first hand in cancer cases. It is the most dignified thing to do for a thinking person. Do you have examples where a large percentage of the cases are obvious malpractice? I have long planned that I will do everything in my power not to stay on life support, and recommend you do the same for the sake of your family and your sanity.
Ceasing or preventing disproportionate medical measures is a very different thing than decisively murdering somebody. To my understanding, living wills already allow the former.