Patrick, interesting read with plenty of items to agree or disagree with.
In the last paragraph when you refer to the brain disconnecting from the material world, you are expressing what many of us believe. Since everything is energy of some sort, the brain/mind/consciousness continues to move along, regardless of form. The most important part has always been consciousness, which is energy that is not reliant on any form.
I agree with Thief, I think---if I understand his thesis to be that none of this requires a god-figure.