If this was suicide on his part due to mental health I think this just furthers the fact that attitudes towards mental health HAVE to change in the aviation industry. You shouldn't have to have a black mark against your name for the simple reason of being human and becoming unwell. As long as you are able to perform your duties safely, I cannot see any reason why it should be treated any differently to say diabetes controlled with insulin. And even if it affects ones ability to fly, then fine take them off them the line for a while, but I can't see why they can't return to work when fit and capable again.
Pilots are human, which often seems to get forgotten about it seems.