Dale's query - I personally don't care which country the music hails from as long as I like it. Then you have bands like Ghost Circus and Toad who have multi-country founding members...I just wouldn't see a value in being able to search by country. But have at it if you like!
Year search - Many adds to the library are re-releases, which generally are tagged with the re-release date. Again, a year search is not important to me, but it looks like it's important to Mr. Waye, and vax is already all over it.