I'm gonna have to be that guy and say that we really can't tell anything from this article in terms of health benefits/detriments so we have to be careful about the conclusions we draw. I did my PhD on the synthesis of glycoprotiens and oligosaccharides. Biologically, these structures are unimaginably complex and their functions are equally complex and mostly unclear. The study seems good on preliminary reading, but the fact that they found increased diversity in these compounds should not be read as "better" or "worse" in terms of health (since the oligosaccharide system is still so mysterious). Just words of caution. I don't have the biology expertise to criticize the methods directly (I'm a chemist) but I just wanted to point out that diversity of oligosaccharides doesn't necessarily indicate "healthier"