Not that it’s much of a resolution for your issue but don’t they generally have this kind information in the Lore books? Since all the previous ones have been so popular I imagine we’ll see a ‘Shadowbringers’ one that will cover at least some lore about this kind of thing. So even if it’s not in the game itself I do think we’ll get something like this in some form in the future.

I do like this kind of thing though, it’s fun to read how the abilities work from the viewpoint of characters in the game rather than as players