Okay just an idea for an upgrade card for turrets since it is the one upgrade slot that there is only 2 options for. (fitting because only 2 ships can take it.)
Heavy Ion Cannon Turret.
Firepower 2
Range 1-3
Attack: Attack 1 ship (even outside your firing arc.)
Before Applying damage change all critical hits to hits. For each uncanceled hit the defender receives 1 Ion Token in addition to normal damage.
Turret Point cost 7
Okay another way to add those infamous Ion Tokens. Also another 360 weapon. Although with this weapon it is harder to hit as it only has 2 attack, For the extra points from regular Ion turrets there is a longer range and potentially the ability to do 2 damage and give 2 Ion tokens but as you see it is easier to evade.
Now all we need is a way to give Imperial ships a turret. How about an upgrade for the shuttle to use turret weapons in an auxiliary firing arc?