Assange is accused of very serious criminal actions that carry hefty prison sentences. The records he is accused of leaking were classified, and by leaking them he threatened US security and endangered the lives of Americans abroad. While there is no doubt that the prosecution could be progressing more quickly, this doesn't entitle Assange to a get-out-of-jail-free card. He needs to face the consequences of his actions, even if that means being extradited to the US.
Prosecuting Assange for the publication of documents that were in the public interest threatens the work of investigative journalists all over the world. Not only would it have chilling repercussions, it would set a dangerous precedent threatening the public's right to know. Furthermore, the political nature of these charges means Assange will likely be held in repressive conditions that will put his life in danger if extradited. This prosecution must be stopped.