These make interesting suggestions, you should consider submitting them. As a comment on some of them...
1. Not sure I understand this one, would you mind elaborating?
2. This has been discussed many times, but not sure anyone has ever actually suggested it.
4. Makes sense
5. Just repeat the filter and make another label, it works.
6. If you have a large number to do you can export filters and import, otherwise, they are basically text searches, so just copy and paste it in.
7. Naming would be helpful, but ordering is not necessary, they all happen simultaneously.
8. Couldn't this just be accomplished by a complex search, with multiple matches?