Actually, and if you could double check me on this it would be excellent – is there a section in this book that even talks about the GM and setting appropriate opposition? There is the bit talking about what Levels represent at the beginning, there's this bit talking about advantages and disadvantages in a very loose way and almost entirely focusing on advantage for the players, but I can't find it anywhere at all where it talks to the GM about how to deal with opposition mechanically outside of the examples.

I don't think I'm blind, but I haven't read it with great thoroughness. Am I missing something?