Somehow, I thought that most of that stuff was related to both Honor and Cultivation. Maybe my understanding of the concept of honor aligns more with the shard of Cultivation that the shard of Honor's concept of honor does.
I have not read the whole thread, but I saw this and thought "maybe it is a Shardblade and it is Shallan's mother's soul. Maybe Shallan has bonded to a third blade, but this blade, rather than a cryptic, is one of the heralds."
I just want it to be clear since, while you did not say that explicitly, I thought you might be implying it.
While the nightmares/shadows of the scholars claimed that the father machine had no desires, Hoid that they were slightly wrong.
What makes it a Necro thread? I looked at the linked guidelines and did not see any cutoff and this thread was started less than four years before my post and has not been locked.
I am pretty sure that unless he was literally a Worldbringer during the Final Empire period, which he plausibly could have been, the Worldsingers were all gone at that time and had been for over 1,000 years.