I ran my group through their first taste of space combat in the last session (the shuttle v shuttle fight from Operation: Shadowpoint) and a couple of questions arose on the subject of slicing enemy systems and the Gain the Advantage action.
1) Since the shuttle had far more weapon mounts than people with the Gunnery skill, the shields on the enemy shuttle were causing a lot of problems for the unskilled gunners. As a result, the team's engineer droid started making slicing attacks the enemy shuttle's systems to reduce its Defence. The way I read the rules, a successful Slice Enemy Systems action would reduce the enemy's Defence in one firing arc by one point, and the effect would last for one round per success - therefore, removing two points of Defence would require two separate successfule Slices. The player suggested that they should be able to spend successes to have a greater effect for a shorter period, e.g. if you get four successes you could remove two points of Defence for two rounds rather than one point for four. Who was right?
2) There were repeated uses of Gain the Advantage by both sides in the fight (with the Imperial punching far above his weight, succeeding on a difficulty 5 roll with only two green dice to his name). As I was running it, the fight started as a turning engagement, with both shuttles coming at each other head-on to bring their four forward weapon mounts and stronger forward shields to bear. Ship 1 succeeded at Gain the Advantage, getting onto the Ship 2's tail, then when Ship 2 made a successful Gain the Advantage the situation returned to a turning fight - one Gain the Advantage cancelling out the other, with Ship 2 needed a second Gain the Advantage to get onto Ship 1's tail. Should Ship 2 have got straight on Ship 1's tail after the first GtA, skipping the balanced phase?