Instead of having an option to include composer, band & conductor with artists, 
have the possibility to specify names of tags (in a text field) to be used in 
searches. It would be really great if you could specify tags to include in 
artist lists (while browsing) and another list only to be used in searches (not 
displayed in browse).
I always specify a single "artist" for an entire album ("Various Artists" for 
compilations) but specify each performer (separated by ";") in the performer 
tag. I also use the composer field  but not conductor nor band. More 
flexibility here could be a very powerful feature!