Do you mean a different offence that does not have the same elements? I don't see what a different offence would look like.
I would say that given the legislative objective of protecting the vulnerable from being in a state of weakness, as the Supreme Court puts it in Carter, in regard to being coerced to commit suicide, that's a very serious offence. With the commensurate mens rea, that's a very serious offence, of course, because a physician in that context would be bringing about that person's death without their consent.
Again, I go back to my earlier comment that this is not really different from the offence of murder. It carries the same elements: the causation, substantial contributing cause of death, and the specific intent to bring about that person's death. I'm not sure if there would be room for another criminal offence and I'm not sure that the CLA would really be in favour of creating more criminal offences to criminalize the conduct of individuals in this context.