Please consider slide-show rotating the top-level tile art for Genre, say among the top 5 or ten artists in that genre. It now appears to use the one artist with the highest track count in the the library for a given genre. Having one or two box sets for an artist skews the calculation even more disproportionately.
I’ve been seeing the same 5 photos of Bruce Springsteen (Pop/Rock), Johnny Cash (Country) and Led Zeppelin (Blues), Otis Redding (R&B) and Thelonious Monk (Jazz) for years now. The overall distribution of artists and genres in my library is unlikely to change more than a few percent, which means the photos will never change. That’s boring, and doesn’t promote musical discovery.