For the other factions, they all have a 'thing'.
Rebels have the Astromech slot
Scum have the Illicit slot
Rebels and Scum collectively have the turret slot
The Empire has....? What? I can't think of anything that ONLY the Empire has, or even the Empire and just one of the other factions.
Even when it comes to pilot capabilities...Rebels have Regen, Scum have ganking, Empire has...?
I'd seem to recall some discussion (long ago) that the distinction came from List Archetypes - the Empire was about 'enabling pilots' and swarms, but that's really not a case of uniqueness any more. An XXXZZZ list is as terrifying as any TIE swarm, and the Rebels can even do proper 7- or 8- ship swarms if they wanted, same as the Scum. Obviously 'Fat' lists or '360 PWA' lists aren't an Empire-only thing. And they hardly even have the best Aces in the game (certainly competitive, of course - but only that. Especially as of wave 8, they have just the same number of PS9 captains as both other factions)
Edited by xanderf