As far as I know, the term “godphone” came about as a reaction to the casual way in which many adherents to resurrected polytheistic religions talk about their communications with the gods. I can understand the reaction. It does take somewhat of a paradigm shift to go from purely secular thought to being able to swallow the idea of the gods in a modern setting, talking to living people now.
That said, I disagree with the idea that the casualness is silly, and that is because the Germanic and Norse gods, whether in folklore or the voice in my and other worshipers’ minds, are real-time experiences. They are hardly ever formal in folklore, even though the speaking style of people recorded long ago may make it seem that way, and in the same folklore, they are also wont to acting impulsively. The term “godphone” is based on the assumption that the gods are trapped in a time gone by, having not grown and changed with mortals, and are incapable of speaking to us in our modern dialects and as spontaneously as we speak to them.