How would you change the ending of the story?

The story is so existential and haunting that I would be hesitant to change the ending. Besides, who am I to change a classic? Kurtz does not become the man Marlow thought he might meet. Instead of a visionary, Marlow finds a shadow of colonial exploitation. Kurtz has to remain a depressing enigma. I could never top "the horror, the horror". I, however, don't know if I’d add as much detail about Marlow returning to Europe as Conrad did at the very end.