The jaw seems like a pretty complicated joint in its function. Not necessarily as complicated in movement as some of the other joints, but as far as clamping force required, and necessity to have proper alignment to function (pain-free).
I don't think that surgery on the jaw itself should be an option in cases other than severe pain limiting function of the joint. If the teeth are crowded, remove a couple - that definitely seems like the choice with the least potential for complications that could essentially ruin someone's everyday life anyway.
When do you propose to do this? You can't do it until the final set of teeth have come in. If you do it later, then it might address the overcrowding of the teeth themselves, but it's too late to do anything about the size or shape of the jaw itself. Maybe you can affect the position/alignment of the jaw somewhat. That can be beneficial in many ways, but I'm not sure it would address the snoring issue.
I don't think that surgery on the jaw itself should be an option in cases other than severe pain limiting function of the joint. If the teeth are crowded, remove a couple - that definitely seems like the choice with the least potential for complications that could essentially ruin someone's everyday life anyway.