I have nothing against reusing assets, but Achilles: Survivor needs to do more than reuse great-looking assets from Achilles: Legends Untold if it is going to succeed in the highly competitive action roguelike genre.
While LEGO Fortnite Odyssey is not as popular as it once was, ultimately, it is still one of the most popular survival games on the market, which is an achievement in and of itself.
While the addition of playable musical instruments is a benefit to Fortnite as a whole, Fortnite Festival has little to offer players beyond nostalgia, especially for those without access to dedicated peripherals.