Before I get into this, allow me to say I have done no research or searches about the following idea. That said it has been stewing for awhile in my head.
What about putting Smugglers and Bounty Hunters into their faction? Each storyline is, at best, a series of not-quite balancing roles for the trooper and agent, It wouldn't be hard to spin these off conceptually, though I realise that in [ractice it would take a lot of work to develop storylines that allowed for this. It's just a thought. I would love to see some thoughts and ideas.