At this point I'm skeptical that Soylent fulfills B, as healthy diets include a lot more than 30-40 ingredients in the form of enzymes and nutrients that aren't "essential" but aid metabolism. But I appreciate the fact that they're aiming for ABD and hope they can achieve it as the data rolls in over time.

If it tastes like gritty pancake batter, it can't be any worse than a diet of brussels sprouts, turnips, rutabagas, radicchio, eggplant, etc.