I think an imperial trooper class would be a very nice class for them to add! For one, The story would NOT be like the trooper one where you are the commander the whole time or any/most of the time.
War droid! http://starwars.wikia.com/wiki/imper...ries_war_droid
As the first one....
Imperial officer(former) :Maybe an imperial officer who has been severely demoted
Another awsome droid: http://starwars.wikia.com/wiki/Sith_war_droid_Mark_II
Imperial guard: http://starwars.wikia.com/wiki/Imper..._(Sith_Empire)
Maybe the class itself can have a rifle and autocannon adv class (just like trooper LOLz) but with different game play that is unlike the already existing Trooper class.