My mother in law is currently dying of cancer, in Oregon, with probably a few weeks to live. She's pretty depressed about it, though isn't considering suicide. My personal goal is to have her take the right medication so that she's as pain-free and comfortable as possible. Hospice is also covering 100% of all medical fees.
I guess what I'm saying is that legislating who can or can't commit suicide based on depression isn't necessarily the solution. Taking care of people so that they can be as high-functioning, pain-free, and financially secure is perhaps a more practical solution.