I agree that they should feature Omega Squad. It would introduce us to some different characters and if they do it right, we could even see how Omega interacts with Delta, since Delta are almost completely loyal to the republic/empire while Omega are the rogue contingent. I would also like to see the Omega's personalities in a game form, they were so much like the Deltas, while quite different in other ways. Heck, they could even throw in some of the expanded characters, like the Nulls.
-Also, I'm currently reading Karen's newest book so I don't know what happens to Sev yet.-