It would be nice to have the option of grouping albums in the main panel by "Genre", "Genre Category" or any other configurable tag, appart from "Album", "Artist" and "Composer" like in the current version.
If this could be done in a hierarchical fashion it would be really useful. An example of hierarchical grouping would be:
Genre category/Genre/Composer/Album
Of course, this should be user configurable.