I read this thread this morning with great interest. Very thought inspiring questions, I must say.
In answer to your question about reincarnation, I can only give my own personal belief, since of course, until we go through death and rebirth, we can only speculate as to what will happen...hehe.
I think that we are all in charge of our own reincarnation choices. I believe that after we die we will, for a short time, experience what we expect to experience (be that heaven, hell, summerland, a nice long rest, etc, etc), and that once the greater realization, that we are - at that moment - one with the universe, sinks in, then we will evaluate our recent past life (the one we just came out of) see what lessons we have learned from it, then we will decide what is still needed to be learned before progressing into our next life experience.
I believe that this process continues until we have reached some form of enlightenment, and then we are able to remain permanently as part of the universal energy.....joining with the God and Goddess, with Divinity, with All That Is.
Of course that is my own personal take on it.
YMMV
Blessings,
Selene