It might be admirable that Phil finally found his meaning of life in his ever repeated one day. But everyone is indeed just as him, repeating their life day by day. No matter you live in a sci-fi or not, it stays the same that you can only alter the world by changing yourself.
Henry Higgins is passionate about his profession but childish in emotion while Eliza Doolittle is energetic and knows what she really wants and dares to get it. What a couple. Bernard Shaw likes happing endings. A lovely story