I love Huttball... But I'd love to see a Hutt expansion. Included in this would be Nar Shadaa gambling (Pazaak!!!). More Huttball arenas with different layouts.. maybe even form actual teams. And.. I'm gonna say it.. Pod Races with buyable/modable racers (capable of bumping opponents off track, of course.) Winners could possibly even win big credits or vehicles.
Just an idea.. but it would make for some cool free-time activities and less grindy MMO nonsense.