I think CG tends to shy away from reworks. From a return on investment perspective: they don't make as much money.
That being said, all the ESB characters need reworks besides CLS, Hoda, Han, Chewbacca, and the Bounty Hunters.
Other characters needing reworks that I haven't seen mentioned much in this thread (or at all):
IPD
Wampa
Other possible new characters:
Luke's X-wing
Han on TaunTaun (I would say Luke, but there are so many Luke's in the game already)
Snowtrooper with E-WEB
Mynock
Scrappy Pilot Han
Jedi Training Luke (with Hoda on his back)
Rebel Hero Chewbacca (with C3PO on his back)
Han in Carbonite
