Probably none of us here has read Homer -- that is, what Homer actually wrote, in ancient Greek. There are people who have learned that language so that they could read Homer wrote. Not having done so, I have no right to an opinion about what Homer wrote, except to say that I envy those who can read him and imagine that many of them wouldn't give up that ability for just about anything.
Happily for us, we all can read what Coleridge actually wrote. If reading his poetry takes more effort than reading a prose paraphrase would, perhaps we should take it that, at last, that would be effort well spent. My experience, for what it's worth, is that it has been.
I would give up all my non-Inklings science fiction* rather than give up the Ancient Mariner, if I had to choose.
*Yes, Wells, Hodgson, Lindsay, Lovecraft, Asimov, Simak, Campbell, Heinlein, van Vogt, Clarke, Bradbury, Le Guin, Miller, Pohl, Anderson, Vance, Brunner... I would give up all those books rather than give up this one poem -- though I would miss some of them keenly.
Ive read a fair amount poetry and I can appreciate it for what it is but, if given the choice , I tend toward prose works.