It's an option, and it sure is neater to those creating the library, but it's much less neater to those using it. Not everyone compiles a PHPDoc for themselves when downloading a library, so then all classes form a nice big pile at the root namespace.
In terms of neatness and ease of use, I choose like I'd choose how to optimize code - I focus on the parts that get most use. Users of a library are hopefully way more than its maintainers, so it feels like it's worth slightly inconveniencing the maintainers in order to have an instantly clear public interface.
In terms of neatness and ease of use, I choose like I'd choose how to optimize code - I focus on the parts that get most use. Users of a library are hopefully way more than its maintainers, so it feels like it's worth slightly inconveniencing the maintainers in order to have an instantly clear public interface.