I've noticed triple art junker can be surprisingly ineffective, though maybe it just depends on the pilot.
However, the rocket speed needs to be reduced. Everyone is calling it a long range weapon now when I don't think it was originally as evidenced by its great firing arc and its only stock position being on the side of the Pyramidion. It's supposed to be usable at range, but its supposed to be exponentially harder to do so. This makes sense because it's an engine disabler, and the only way to escape it would be to get away from it, and that requires engines.
As for what it should be able to do, I don't think it's necessary as a long range disabler because, one, you don't need that often, and two, the Mercury cannon already fills that role. It's also not needed as a long range explosive because the light flak fills that role and it's more accurate than ever.