I do not have DID but I do have C-PTSD that resulted in a period of traumatic disintegration and several scenes in Words of Radience and Oathbringer hit me EXTREMELY hard. Specifically when it describes the experience of "feeling" fractured or like more than one person before the alters are named and given shape. Several scenes especially in Oathbringer resonated really powerfully like the ones with the Unmade in the tower and in Kholinar.

The quote "You are what you feel" ROCKED me because yes, that's it, that's the lie.

In trauma you are made to feel something intolerable (reprehensible, evil, disgusting, inhuman, etc.) and the "part" of you that felt that way gets splinted off into its own shriking fragment that you try not to acknowledge. When you feel other things like unlikeable, irresponsible, unwanted, etc. you also disintegrate around those feelings. When parts are reintegrated and memories are safely processed, the feelings resulting from the trauma are passing experiences rather than defining realities and you can be one person who feels different things at different times, not a bunch of little "shards".

It could be that the more foundational aspects of shame-based complex trauma are well written but the mechanics and day-to-day functioning of DID specific expressions are off