I'd rather not bore all of you but i am very intrigued by the Republic Strategic Information Service style. Im reading SWTOR Annhiliation by Drew Karpyshyn and he describes Theron Shan's combat style very uniquely in comparison to anything else in swtor. it is similar to the imperial agent, obviously. but a little twisted. They focus more on disabling foes by whatever means possible instead of killing. Hey have dart launchers on their wrists and seem to excel in hand to hand combat, obviously for disabling. It sounds pretty close to the IA's advanced class that uses knives but im sure something can be done to really make the two classes very different.
Could be fun.
Now write up advanced classes, something to make it different from being Smuggler, and create an Empire Mirror class version. Write up new quests too, and get a lot of new voice actors for speaking parts too. Don't forget creating new armor looks and animations for powers. Then there's whatever they'd use for their ship. The bit I mentioned for a mirror class? Yeah, apply all that again to keep the factions balanced.