As someone who looked into quite a few things and making up my own theories, i came across a question you answered about god tiers. We know that our interpretation of Heroic/Just deaths are really up to us to decide, but what do they do? When a GT player dies in one of the deaths are they revived or do they stay dead? or do they get revived when their death isn't either of the causes? Recalling from John's fight with Jack i thought they revive from a Just/Heroic Death?

No a heroic or just death means they stay dead.  They come back if their death wasn’t heroic or just.