I am betting this has been a topic many times, however after careful thought I think the game could benefit from the following. They could potentially breathe some fresh air into things, especially if well written. Some might say "oh, thats just a trooper for imps and an agent for pubs". BUT they could be altogether unique and different, both in abilities and in story telling.
1. Races:
a. Trandoshian
b. Voss
Classes:
1. Imperial Guard class story
2. Republic SIS class story (think James Bond).
Thanks for your consideration.