God having finite power fits in to the luciferian gnostic philosophy, in that the God in this reality is actually a demiurge that is pretending to be God and lucifer was sent (Michael beihn) terminator to help humanity. According to luciferian gnostic there is the great unknowable God, the fake God of the Bible and lucifer the agent of the great unknowable God to wake up us (neo, matrix)
In any case, the idea of Lucifer has now become associated with attitudes and practices that are very much in line with those of the demiurge (more specifically, the aspiration to "be like God", exactly like the demiurge, who wanted to be like "the real God", but was only able to create a very imperfect material world, so he failed miserably), hence it is not a useful metaphor/myth anymore, as it gets associated with making this world even more cruel and horrible, rather than with righteous rebellion against the demiurge's arrogance and wickedness. The only true rebellion lies in trying to make this world a less horrible place (regardless of the concrete possibility of succeeding in any permanent or significant way....)
Of course I'm only talking symbols and archetypes here! I don't take any of this literally, obviously. These are "stories" that help us to make sense of things, but the map is not the territory.
I agree that equating the word Lucifer to Satan is a distortion (the word Lucifer did not mean this - it's a name for Venus, the morning star) but at present Lucifer evokes Satan, the Devil etc. which are most definitely not archetypes and concepts that are useful to anybody.
wikipedia: " "Lucifer has become a byword for Satan or the Devil in the church and in popular literature", as in Dante Alighieri's Inferno, Joost van den Vondel's Lucifer, and John Milton's Paradise Lost. However, unlike the English word, the Latin word was not used exclusively in this way and was applied to others also, including Jesus: the Latin (Vulgate) text of Revelation 22:16 (where English translations refer to Jesus as "the bright morning star") has stella matutina, not lucifer, but the term lucifer is applied to Jesus in the Easter Exultet and in a hymn by Hilary of Poitiers that contains the phrase: "Tu verus mundi lucifer" (You are the true light bringer of the world)."