As far as I can make out, the Controller UI doesn't allow for the listing of all tracks for a particular artist when browing by artist (unless you clear out your current playlist in the process).

This makes it difficult to find a track by a known artist if you don't know which album its on, and makes selecting tracks across multiple albums a little tedious.

My suggestion is, replace the existing "Play All" menu option when browsing by artist with a "List All" or "All Tracks" option. Selecting this option would display all tracks by the artist regardless of album (in alphabetical order?). Clicking the Controller's play button on this option would play all tracks by the artist as per the current implementation.

This approach would be consistent with other parts of the UI where the Play button causes the immediate playing of the highlighted option, but the Select button yields further information.