This paper and the SACC proposal illustrate various things which are broken in modern bird taxonomy practice.
1. It should be prohibited to name a new species after yourself (or in a way that achieves the same thing, e.g. for your parents). It's not prohibited in the Code, but it still remains the height of bad taste and bad manners, reflecting worst of all on the author. It also produces a conflict of interest: if the author so wants immortality, he may cast aside objectivity in analysing the taxonomic proposal.
2. Peer review versus non-peer review, The original description here is self -published, without the rigour of the peer review process of journals. People discuss whether this should be allowed for naming organisms, but it remains possible under the Code. I am not convinced publication venues should be restricted too drastically. Whilst peer review generally means that only good papers tend to be published, many other good papers are sacrificed along the way, and many journals and reviewers are affected by conflicts of interest themselves. But there are a few instances now of self-publication creating serious problems, especially in herptiles and Canada Geese.
3. Questionable "medicine" being meted about by ornithologists, via SACC, to address these issues. We now have a non-peer reviewed, non-objective, chatty, vitriolic, entirely critical piece as a SACC proposal to address the problems raised by the non-peer reviewed, non-objective paper. Pots and kettles, calling each other different colours. The proposal makes no effort whatsoever to make the positive case for the taxonomic proposal being reviewed and seems only intended to grandstand, flag-wave, criticize, express disgust and achieve an objective of having the work rejected.
Unfortunately, SACC has an illustrious and long history of trashing external works in one-sided, myopic, uninformative, often (as here) vitriolic, unpublicable proposals. In some cases, they have been proven wrong. See this (non-peer reviewed, self published) open letter:
Donegan TM 2019. On conflicts of interest, bias and deviations from the International Code of Zoological Nomenclature in a taxonomic committee, the South American Classification Committee of the American Ornithologists' Society: an analysis of previous cases, with recommendations for reform. DOI: 10.13140/RG.2.2.35777.51047
https://www.researchgate.net/public...tion_Committee_of_the_American_Ornithologists'
4. That leaves the rest of us wondering what to do. I am sure the description leaves a lot to be desired; the conflict with molecular results is probably very informative. However, when I see pieces like this, and not knowing the birds at all, the only thing you can do is say "meh" and remain to be convinced either way. The SACC proposal ticks the box on pretty much every indicator of "pseudo-scepticism" discussed in the above-mentioned paper, continuing a long tradition of such SACC behaviour. That something is pseudosceptic does not make it incorrect. However, just like the description of lopezlanusi, there is no objective way for the reader to have any positive conclusions about such a piece.