All good SF authors are nutzo when measured along some axis....
..and Card has never been apologetic about his beliefs. I think his fall from producing works like the Ender 4 and Pastwatch, to drool like the Bean series that I can't force myself to finish, is reflective of his drift into more concern about matters of a metaphysical nature. I respect him for his body of work but when it comes down to it, he's not a biologist but an author of fiction with a particular sense of reality.
Just skimming, but does it seem like he's composing a crib sheet to keep himself convinced?