IMO, both those stories work on many levels. They might have character relevance, in fact, they certainly do, especially to those characters to whom they are being told, but for me, the most obvious parallels are in the history of Roshar. Namely, the Fleet story looks sorta like an exodus from Ashin and Girl Who Looked Up is like the subsequent discovery of surgebinding. I'm not sure, though. Those are just guesses.