I'm also not particularly excited about the focus on fixing us by resolving sleep problems. It's just overly-simplistic. It might be a bit relevant for a little symptomatic relief in some cases, but that's pretty much it.
During my first bout of illness, people used to say that you couldn't recover from ME until you'd fixed your sleep. I don't know if that's true but some fairly major repair stuff goes on while you're asleep - I don't think it's necessarily a trivial issue in ME.