If you read the link these rules only apply to labeling for anything marked as a "Meal Replacement" product, like soylent.

So if Soylent changes the label, they're fine?

Even if this got them over regulatory problems, they're still in the business of selling meal replacements. What are they going to market their products, as? Dessert? Meal supplement? Their whole business is about selling you all you need to eat.