Currently, the base Ion9 is still a bit weedy. Dvalin fixes this by automatically enhancing it (one of three random enhancements) on giving it to the player......but that's a bit problematic:
Quest items should be adequate rewards without requiring enhancement, and if the weapon is always enhanced, it should just have that damage (Edit: IE, the lowest constant enhancement) to start out with. Yes, it would make it extremely powerful when fully enhanced by the player....but as a lategame quest weapon, this is an endgame gun. Thus, this probably isn't much of an issue.