One of the big problems with the pirate Falcon is that it goes from the ordinary, unremarkable Falcon to something that can mount nearly as many med missiles as a Legion, or two meds and turreted ballistics, but retains most of the Falcon's good qualities; flux stats are mostly the same, maneuvering jets, good shield.
I'd swap the Composites to the hardpoints at bare minimum, and ideally it would get a serious rebuild - putting a medium Missile hardpoint in the trench, swapping the Composite turrets to Missile, and shrinking the bow hardpoints to small Ballistic is one idea - to be less of a death machine. But simply increasing OP costs wouldn't really solve the problem of how much flux-free damage the Falcon (P) can do. It just flatly needs fewer medium Missile slots. It could even go down to two, and get Fast Missile Racks for a system to keep it scary, but without the current insane, fluxless alpha potential.