Don't know if anyone else has said this or if it would ever be in the game, but I would love to see a "Death Blossom" device that, when activated, auto-locks every target within a short range, then spins the ship madly, firing all weapons and ordnance in a massive salvo at the targets. As a price for this insane power, it does leave the ship temporarily drained of energy, emptied of ordnance, and immobile or sluggish as systems reset. A weapon of last resort, and not something advisable with powerful enemies or capital ships in the area.
Failing that, the Annihilator Virus does have a definite appeal in the chaos and mayhem it could create, too.