Here’s what I’d like to see. We start the game with:
Sith: Sith, Bounty Hunter, Spy
Republic: Jedi, Smuggler, Trooper
And then we play one of those six storylines to completion when the ultimate choice in each is to choose which faction to continue fighting with. Thus, at end game, the factions are potentially:
Sith: Sith, Bounty Hunter, Spy, Smuggler, Trooper
Republic: Jedi, Smuggler, Trooper, Bounty Hunter, Spy
Can you see the cleverness at work? BioWare only has to write six quest lines… and can concentrate on six awesome stories… but at end game there are really 10 choices of what to be playing between the two factions. Clever, yes?