'Fraid I've no answer for you, but I suspect other folks, like me, are still trying to figure out what you're trying to achieve that can't be done by browsing for artist. Select your library, type the artist name into the search field, bam, you've got a playlist by artist. It's temporary, of course, but I'd think that's a benefit, since it won't be crowding your source list when you're not listening to it. And if you use the browser in the library, it's already broken down into folders for each album.