Imagine an EPT or pilot ability that said "Once per turn, if an enemy ship takes an action within Range X, pay cost Y to cancel that action." Basically, it's an X-wing counterspell.
This seems situationally very strong. Crummy against swarms, but brutal against a ship reliant on boost or barrel roll to get put of the way. What is the right cost of this ability? Self damage? Stress or Ion tokens? Because of the power of the EPT, it probably is better as a Pilot Ability than an EPT. For example, a named TIE Fighter could have it and the cost could be one damage, so you're not shutting down a ship all game long. As an EPT, you could make it discardable, so it's a one-time knife in the gut, but not a total NPE.