This is true, that nothing really changes except you don't have a body. If you're not in heaven before death you won't be after, but if you were in heaven before death you wouldn't die. Some astral projectors can see and interact with the dead people in purgatory, they live in fabricated worlds that they think are real for God knows how long, the religious heavens exist there, formed from collaborative human beliefs. However I do believe there is an angel that offers a fast track to heaven when you die and if you refuse she comes back a week later, and if you refuse again you're on your own archangel Azrael.