My personal stance is that I cannot conceive of how a God could come into being on its own, and I cannot conceive of how a universe can come into existence on its own. Talking about zero-sum energy fields is not satisfying to me because the theory still posits that something very potent existed from the very beginning and something caused a disturbance in that field.
Therefore our existence is, according to our current knowledge, inexplicable. Without enough data, we have no right at this time to say which of those two causes, God or random energy fluctuations, is more likely, nor whether there might be additional options besides those two that we haven't thought of yet.
Occam's Razor is not useful in a situation where we lack so little knowledge. Besides that, if a god exists, then the universe's degree of complexity simply is a result of the pre-existing complexity in his mind, and therefore the sum complexity of god+universe is not greater.