Disruptors have always been a mixed bag at my tables.
We never saw them in action during my d6 games (people were too obsessed with melee/lightsabers, but they were mostly black-ops commandos anyway), but in my old d20 campaigns, they were normally picked up by the gun nuts of the group solely for the firepower.
In my last campaign of EotE, the players "inherited" a bounty hunter's "trophy room" as payment for a job (the hunter planned to die on the job, and was basically paying them to ensure they arrived to a dangerous area and kill her in the end). One of them random rolled items was a broken disruptor rifle.
The weapon was immediately fixed, but was NEVER fired. In fact, it was "used" twice: the first time by the pilot/mechanic when he first picked it up and tried to use it (and realized it was broken), and the second time by the Heavy, as it was handed to him to intimidate someone else during an interrogation. Even when a massive fight broke out no one wanted to use it, and the reasons ranged from "I don't even know if it'll work" to "I want to kill them personally with my cutlass."
Not sure how my new group will deal with them, but I'm sure they'll be amusing since one of the players is a droid bounty hunter. . .