No, I don't think it's enough. I find article's conclusions too strong. One can easily imagine scenarios of "purposeful manipulation" that aren't discussed in the article. For example:
- Artificial evolution to breed a virus with desired traits, using a model not previously published.
- Collection of natural viruses with nefarious intent. Selection of one with traits deemed suitable for human transmission, and purposeful dispersal.
- Collection of natural viruses with beneficial intent. Accidental infection of the investigator and release.
It would take forensic investigations on the ground to discover evidence of these. We can't rule them out by just looking at the sequence.
I am not specialist in the field of virology or molecular biology, but I find interesting your thread & probably you might find interesting this links [1,2] provided below about the SARS-CoV-20 chimera:
I found divergent views on "SARS-CoV-20 chimera´s bind to hemoglobin" ongoing research. It would be interesting to hear voices from the field in terms of their take.