Smackdown tag titles are doing nicely. And the division, although often made up of midcarder pairings, always seem to have some decent team whether its Rey/Edge, Rey/Kidman or whoever. And WGTT are awesome as champs.
It's tempting to say 'Do away with the RAW tag titles' but with a little effort, I don't see why it couldn't have the same success. No one ever tries to hold down tag teams. And there are lots of good wrestlers on RAW doing not very much.