I'm a beginner, but I must say.. shouldn't this be configured by default? I wouldn't say that this is a big issue, considering that it would take just 2 minutes (or less) to set this up for any new project.
@JunTheProgrammer Laravel is a framework where you build different things.
Namespaces is a PHP thing.
Laravel doesn't know which facades/classes you'll ever use. So it isn't 'pre-configured' by default. Not everyone uses Schema on a ServiceProvider for instance.
A workaround for this is to use an IDE like PHPStorm. It automatically adds the namespace as you type the class name.