Precisely, it raises questions. Questions that strike at the core of Darwinism. If you can't parse what the researcher is saying, any attempt at rational argumentation with you is futile. I'll try to explain. His research indicates that natural selection cannot explain certain features common in eukaryotes via selection on morphological complexity. And by implication, this shortfall undermines the assumption, which means no proof, that natural selection explains the emergence of multicellular life. IOW no life bigger than single cells. That pretty well shoots "Origin of Species" through the head, if true. But he has evidence that supports that shooting.
If that’s how it turns out, so be it. But you’re already drawing conclusions about the results before the process is finished. There’s still peer review of the methodology and independent reproduction of the results to be done, and even the conclusions from that are subject to revision if new evidence comes along.