That is where you went wrong, thanks for narrating it that way as highlighted above. There are two types of nothing as per K.C Cole and putting them as subset of each other is fault and does not appear anywhere in mathematics. By definitions derived from mathematical equations that you can understand these are totally "different nothing" and confusing them has led you coming up with wrong supposition that the nothingness that is linked with perfect symmetry by Cole will lead to "eliminations" or the results will be the same as the other vacuum nothing which is not perfect symmetrical.
Your early premise was based on the line of thinking of nothing in a vacuum manner which is taken away by K.C. cole as the mathematical equal of perfect symmetry. Here nothingness definition do not based on emptiness, void, zero as you would wish.
Your "nothing" which rely on the physical laws of the universe we actually live in as you brought it forward that will lead to nothing existing not even God is not perfectly symmetrical thus not the nothingness in line with that of K.C Cole's. I am saying this because your argument was:
"So if god is the height of perfection, there would be nothing existing, not even god."
However, the nothingness that K.C. Cole suggests as which is what Edward Witten would put as perfect symmetrical embodies the natural set of laws in their ideal. Umeitetea argument yako kutokana na aina tofauti ya nothing ambayo inapelekea wewe kujiridhisha na wazo lako. Aina ya pili ya nothingness inaongelewa hapo haileti "there would be nothing existing, not even God". Things could exists in a perfect symmetry that no changes would appear when you do anything. Weather you go up or down, whether your travel backwards or front, hot or cold.
Author converges to your point? And still you didn't grasp the meaning of nothingness he is writing about!? of course its not easy.