Two potential points you could address:

1) The Use command can also perform aliasing, e.g. "use ExampleNamespace\subnamespace\foo as TruckNuts" allows you to alias the class to something else. This can help improve code readability. And you can to $foo = new TruckNuts();. (I'd recommend not using that exact word as the example :)

2) Many people have complained about the "ugliness" of PHP's namespaces. Maybe you could adjust the post to have a section comparing PHP Namespaces to those of other languages, and explaining why such notations would not have worked with PHP?