The focus and the point of view are related, but not the same, for this novel. The point of view is essentially metafictional: it is fiction that draws attention to the process of writing, and to the fact that it is fiction (made up). This means that the point of view, which varies, is sometimes a third person point of view following Dwayne Hoover, and sometimes an omniscient discussion of the world and the larger universe. The point of view is not stable, and that's intentional. Vonnegut is partly making fun of the practice of telling fictional stories, and partly trying to come up with new ways of telling them.