I agree that no language, including Arabic, is divine. Of course we are required to learn the Message of the Quran, but we can do this through mediums in our own languages. I do also understand the argument that the Quran is best understood in its original language (i.e. Arabic), but at the present time it is not possible for every single individual to learn it, especially since the particular dialect the Quran was written in is now a so-called dead language and is almost completely out of regular usage today. I recall reading in Asad's preface to his Quran translation (written at least a couple of decades ago) that the Quraish dialect was a fast dying language. So technically, even modern Arabic speakers need it translating for their understanding.
And thanks very much for the reading recommendation. I'll certainly check it out. :)