Focus: include Artist as a search criteria

I would like to see additional search criteria in Focus, specifically Artist.

Please add Artist as a criteria in Focus when in Album and Tracks view. If you use “Performer”, you don’t always get what you want. For example, I want to see the solo albums of Lennon and McCartney. If I go to Albums and Focus on Performer = Lennon and Performer = McCartney, you will get their solo albums, and also all the Beatles albums, compilations, contributions, etc. Which is correct for Performer. But I don’t want that. I want just where Album Artist = both Lennon and McCartney. There are other ways to accomplish this by creating playlists or tags and bookmarks. But those are all static, not dynamic, and I don’t really want to save these, I just want to be able to filter something that I might want to see once and done.