I think it's important to maintain the proposed species pages because of the inevitability of the taxa to be recognized as distinct species. Contrary to the lack of resolution by committees, it is still knowledge of significance and still deserves recognition. Incertae sedis placement of the genus will be maintained to reflect the lack of any concensus, but there's no logical reason to hold off on article creation for taxon on the road between hypothetical and scientifically distinct.