Given the announcement that the clone wars are coming to legion, the Droideka is almost certainly going to be joining the game. This presents some unique challenges associated with this particular unit.
1) Movement modes: To really capture this unit there should be two different modes, one that is high speed but it can't attack and has weak defense and one that has low speed but high offence and defense. They could handle this with condition cards like they did in X-Wing or they could just leave it as the combat mode and not deal with the movement mode.
2)Shields: The Droidekas maid defense came in the form of a personal shield that could deflect most small arms fire, but was weak against things like grenades and melee weapons which moved slow enough to pass through the shield unhindered. I was thinking that it could be represented by a new keyword:
Personal Shield: If this unit is the target of a ranged attack that contains no keywords this unit gains a (red defense dice) and (defensive surge to block).