I think this particular god needs to learn a little more astrophysics. When the sun expands into a red giant it will fry the inner planets, and when it later contracts into a white dwarf it will still be there, so its gravity will still retain the outer planets in orbit. As for free will, no one who studies human behavior gives that any credibility; for the most part we humans act unconsciously (evolved behaviors are largely hardwired) and our tiny ape-brains then desperately rationalize why we just did something. Because we're unaware of this phenomenon we believe the products of our brains, but research shows these beliefs are entirely spurious. Not unlike, coincidentally, beliefs in gods, goblins, ghouls, and ghosts.