Recent papers based on evidence discovered on 67P by Rosetta, are trying to shoehorn evidence into alternative primordial or otherwise formation narratives. However, if the comet is actually a highly processed object, none of the visible evidence can have anything to do with primordial processes.
I have used their many lines of evidence summarised in a diagram, as evidence that the comet is processed, and that therefore the whole narratives are speculative and evidence free from the perspective of what Rosetta is studying.
Click for high resolution image:
Comets are the most processed objects in the solar system...