I don't know enough about linguistics to have an opinion on that, it just seems too short and lacking sources and explanations for the layman, but to be fair, that's really just getting the "politics out of the way". I'm very sensitive to people trying to have a go at other people they can't face directly, and I was absolutely primed to be upset about that here, but I didn't get the impression at all. Maybe I'm wrong, but fwiw and all that.
It's an appropriately weak start to a bland document.