AVSub can now look into multiple sub-folders in one go. This works for downloading or queueing in the current playlist and there's a new option to directly play. It's all accessible by swiping on a media cell.
The number of subfolder levels that AVSub will look in is defined in the settings, and you can also tell it to ask you each time. This means that you can directly play all tracks from a given artist for instance (if that's how your music is organised). Or you could download the contents direct to the cache.
Keep those feature requests coming in!