It's not limiting anything, it's just literally only 2 choices, something either has a cause or doesn't, there are no more options, doesn't matter if it's a god or not, the point is that god being random, since he can take any decision he wants because he wants to and it's not influenced or caused by anything else, creates other causes that are random because the first cause it's god and god is again, random.
Because you say it?
There aren't any mankind-understanding choices before the universe existed. This doesn't mean that there weren't choices in God. God-choices are different than man-choices, and do not even fall into the category of choices. If God-choices were like man-choices, the universe would have been here already... at least in the basic form that it is in.
C&E and random didn't exist before the universe existed. At least not in any way mankind can understand. Why? Because mankind understands according to things of the universe, because he is an integral part of the universe. Or do you have evidence that he isn't? Even science agrees that he is.
Get over it. What existed "before" the universe is utterly and entirely outside of our understanding and thinking. No random, no non-random, no C&E, no non-C&E, no before.
God, having created the universe, is the First Cause, "before" there were any effects. God, entirely different than man before the universe was created. God, having interjected himself into the universe after creating it, in the form of Jesus Christ, to die on the cross and rise again, to save us from our mistakes... mistakes like thinking universe stuff can apply outside of the universe.
Evolution isn't only a hoax. It's sheer stupidity.