Just a random thought.
How ECM currently works can be kinda oppressive, especially against carriers.
Also rng mechanics suck.
I would like for ECM modules to immediately break a target lock when first activated (if the targets sensor strength is weaker than accumulated jammer strength), and then giving the affected ship a 5 minute immunity to the target breaking effect. And also apply a stacking (per ECM jammer activated on same target) debuff to target lock timers.
The lock timer debuff could either be %based or add a flat 2s lock time (which can not be reduced by NSA or other modules) and be either %increased or %decreased by targets sensor strength vs. jamming strength.
As for fighters, considering how ECM works in EVE, realistic would be for one jammer to jam one fighter instead of the whole squadron, but for balance reason let’s say they affect 1/3/4 (based on type) fighters. And have the ECMs act as a flat 33% effectiveness reduction on the squadron. Eg. 3 jammers on a combat squadron would reduce its damage to 1% , or a Siren squadrons points to 0.