According to Ayurveda only one kind of nutrition does not fit all.
The food recommended for those suffering from Vata/Pitta/Kapha imbalance varies, not only in terms of ingredients but also finer details like temperature which affects the metabolic rate.
I doubt that prolonged consumption of the same formula will result in convergence of the dosha makeup of several different people because food is not the sole driving force in a person’s dosha makeup.
Furthermore, the nutritional needs of a top 10 tennis player like David Ferrer differ from those of a top chess
player with ELO of 2800+ who rarely exercises his body, or a dimwit who doesn’t exercise much of anything.
Therefore in my opinion the future of soylent is to take into account a person’s existing cell makeup and production of personalized nutrition. A person’s blood composition or even the DNA structure may need to be taken into consideration.
If that is too ambitious at a minimum soylent production could be geared for the person’s dosha mix.
This is what will separate a leader in this new engineered food sector from imitators and those who bite the dust, in the not so distant future.