I think the existing safeguards are more than adequate to deal with adding mental illness as a sole underlying condition.
I have found it very troubling today to hear MAID providers described as murderers. If there are egregious provisions happening, there should be criminal charges laid. There should be reports to the police. There has never been a criminal prosecution of a MAID provider. Similarly, they could be reported to the appropriate college. Again, we don't know of any disciplinary proceedings that have successfully resulted in any sanction for a MAID provider.
I think the existing safeguards are very strong. There are multiple criteria that have to be fulfilled, and these can accommodate MI-SUMC.