I'm wondering the same. The only thing that jumps out to me is 9g of sugar but even that is not bad. 20g of protein in a 400 calorie meal is pretty good.
Yeah I'm hoping the parent responds, I don't consider myself an expert on nutrition so I'm curious if theres something we're not seeing! I tried Soylent for a bit and had mixed results, but that was I think mostly due to misjudging how many calories I actually needed.