Soylent has refused to make basic changes to improve their nutritional profile based on widely known and accepted research. Lots of their micronutrients look optimized for cost and not for human health. E.g. Soylent uses D2, when even 30 seconds of googling should have turned up evidence such as:
http://ajcn.nutrition.org/content/84/4/694.full"ergocalciferol should not be regarded as a nutrient suitable for supplementation or fortification."
D2 and D3 are metabolized so differently that they result in the "production of unique biologically active metabolites."
Ergocalciferol is the version used in the Soylent powder, while the bottled version doesn't even deign to inform the consumer what they are getting (it just says Vitamin D)
The fact that this problem exists and has existed for years with many of their ingredients indicates that they aren't even doing shallow research into nutrition.
(https://www.MealSquares.com try to provide multiple sources of all micronutrients from different food groups)