So Rebel Aces introduces the Chardaan Refit, providing a service (-2 squad points) in exchange for an upgrade slot (bye bye missiles). Interestingly enough, it's a title card and not a straight modification so A-wings can still take a stealth or shield modification etc. Likewise, in the Pilot Building Forum Game (which is awesome), people have shown some pretty innovative ideas that have got me thinking.
What about modification cards that swapped, exchanged, or otherwise "costed" either slots or actions? For example:
[Modification]
Reconnaissance Package (2pts)
Small ship only
You gain a systems slot, up to a total of 1, in exchange for a secondary weapons slot.
or
[Modification] (2pts)
Slaved Targeting Systems
Small ship only
Your action bar gains the target lock action, in exchange for the barrel roll action.
In the first example the systems slot is gained at the expense of a secondary weapon but includes a 2pt tax on the implied systems upgrade. In the second, a non-native action is gained in exchange for a native, preventing OP buffs and forcing the player to likely exchange a ship characteristic naturally suited to it. I know not everybody is a fan of costing through upgrade slots but I think requiring a point tax and/or a native trade keeps each ship's unique identity largely intact. You couldn't abuse it because it would either weaken the ship's very nature or become so expensive it cripples your whole list. Furthermore, if they are modification cards, it also "costs" any of the traditional potential modifications. In the mean time it would allow for minor tweaks and represent a "starfighter garage" representing refits that happen across both factions.
I'm sure some combinations can be thought of where such a swap would create a monster OP ship given other upgrades, etc. but that seems easily countered. Maybe Reconasissance Package is only for ships with a hull of 3 or less, is meant just for generics, or PS < X. Whatever.
Thoughts?