The split snatch is a perfectly reasonable style for people with shoulder flexibility/upper back issues. It is not in fashion right now, so there is pressure against its use, and this is unfortunate. Many people who cannot squat snatch effectively can lift bigger weights if they split. Even if it's psychological, they can be used to build confidence with the movement, and then later the squat snatch can be tried again, perhaps with better success. But I don't see why the split style is so vehemently argued against in some circles. You'll see it at the masters nationals, and you should see it more at open meets than you do.
One of the biggest problems is that nobody remembers how to coach it. Read the article, watch my video. Let me know how I can help.