I think the Imperials should get:

KX Series Security Droid:
Your action bar gains the Coordinate Action.
Or:
After you complete a green move, if you did not overlap a ship or obstacle, you may perform a free Coordinate Action

Then the Rebels can get the unique:
K2SO:
Once per round, when defending, before the attack rolls attack dice, you may guess aloud the number of hits that will be rolled. If correct, assign a Jam token to the attacker.