What about introducing some imperial figures that are focused around mitigating the bonuses the rebel/merc support figures provide?
Maybe a droid that sits at the terminal and limits the amount of command cards a player can draw in a round. Or maybe that droid can force random comman Card discards from the players hand when he passes a certain threshold. Or a ranged unit that can spend a surge to strip a focus off a unit.
It would be very thematic to have imperial units that are focused on denial/limitations. I think 0-0-0 was a step in the right direction for Imp but let's take it a step further. Blaise was a good step in this direction... then they kind of veered off that track again.