For every hit in The Who's canon, there's an underappreciated companion: The pristine “So Sad About Us” is of a piece with jangly mid-'60s standards like “Pictures of Lily”; “The Real Me” delivers all the stadium-rock swagger of “Won't Get Fooled Again” in a third of the time. And then there's the disco-kissed pop of “Athena,” which ranks with “You Better You Bet” as a post-Moon highlight.