Use more PHP standards (namespaces)

Not just namespaces .. Traits , interfaces and others must be added to CI.
Even base PHP interfaces and class's as Iterator, ArrayAccess, Serializable, Closure, can be used on some places..

CI must go closer to PHP base practices in OOP programming..

Couldn't explain it better. I think this is a must, and CodeIgniter should move towards modern best practices in PHP.

I agree, too. Keeping the syntax as $this->... is 2005 era PHP.