The chapter On the Ruin of Doriath in The Silmarillion is known to have been a rather extensive synthesis by CJRT of JRRT's existing texts (plus a bit of his own creativity), which were less cohesive/inter-consistent than and with the other parts of the Quenta Silmarillion that was being assembled. There are sources and discussions here and here. Key quote (emphasis added):
This story was not lightly or easily conceived, but was the outcome of long experimentation among alternative conceptions. In this work Guy Kay took a major part, and the chapter that I finally wrote owes much to my discussions with him. It is, and was, obvious that a step was being taken of a different order from any other ‘manipulation’ of my father’s own writing in the course of the book: even in the case of the story of The Fall of Gondolin, to which my father had never returned, something could be contrived without introducing radical changes in the narrative. It seemed at that time that there were elements inherent in the story of the Ruin of Doriath as it stood that were radically incompatible with ‘The Silmarillion’ as projected, and that there was here an inescapable choice: either to abandon that conception, or else to alter the story. I think now that this was a mistaken view, and that the undoubted difficulties could have been, and should have been, surmounted without so far overstepping the bounds of the editorial function. (from: HoME XI: The War of the Jewels: "The Tale of Years")
The big question is, has CJRT ever indicated how he would have "surmounted" the "undoubted difficulties"? He discusses the various difficulties immediately prior to this passage (quoted in the second posting at this thread), but I haven't read much of the History of Middle-earth, and haven't seen any quotes around the internet of what he might have proposed.
