Soylent is definitely not "perfectly tailored to your body" and it probably isn't "everything the body needs", for the simple reason that nobody has any idea what the body needs, let alone how to tailor a perfect diet. Nutrition research is extremely complex and fraught with false findings. When John Ioannidis said that most medical research findings are false he singled out nutrition and genetics as the most problematic fields.
False advertising this particular product can be dangerous because a lot of people get obsessed about diet and health, and tend to cling to whatever subset of findings they happen to have heard, and then treat the whole thing religiously.
Some nutritional deficiencies become apparent only after years and then possibly only in people with a certain genetic makeup.
You are targeting a population that adopts health fads like they were the ten commandments, and are trying to sell a product that has properties you can't possibly know. Please stop because you may inadvertently hurt people.