EPI might have the most flaws, but I think it's also the most salvageable. Sure Jar Jar can be annoying and the pod race is too long and the announcers are annoying, but those can all be trimmed out. Phantom Menace also has the best acting of any of the prequels (IMO), has much more heart and the most "worth saving" moments out of any of them. Also it feels more like a star wars film. It legitimately doesn't feel like a video game cutscene. And it's the last sw film to use actual models for ships, and it shows.