Sorry for the late response. I don't think the bars were intended to serve as meals or to constitute a "huge part of your diet." I think they were meant to be like Cliff bars--not them specifically, but the category--in other words, snack foods that give an energy boost and some sustenance beyond empty calories. It's a pretty huge market with loads of brands; I like Zone Perfect, for example, which are much sweeter than Soylent bars. That's the universe I compare the bars to, and in that universe, Soylent bars are not sweet.
I agree that the price needs to come down (a lot). I like snacking on them and other kinds of "nutrition" bars, because I like how they taste and that they satisfy much more than typical snacks, which are usually unhealthy. I don't like the texture of fruit, or that's what I would snack on, since fruit obviously comes with greater health benefits and less downside (and cost), but since I can't do fruit fruit, bars are the best option in my book. They sure beat chips and the like, both by including more that is good for you and by leaving out more of what is bad for you.