All this article proves, if true, is that the characteristics of the virus do not prove that it was engineered, but neither do they prove it wasn’t.
They seem to say it wasn’t engineered:
“But they’re wrong; it’s still not engineered. An analysis of the paper clearly reveals that: - snip - The 2019-nCoV genome does not contain remarkable genomic properties which need explaining, and for which we’d look to some kind of bioengineering as a cause. “