After some thought on this matter, I believe that there are two things, that if both done, would change the Artemis from a support gun, to a main weapon.
Higher velocity rockets and larger area of effect for the shatter damage.
This would make it easier to destroy components, creating a weaker but more precise hwacha. A well gunned Artemis could then keep an enemy disabled and slowly achieve a kill allowing a less risky but slower kill than a flak and giving an alternate to the current meta.
At present this strategy is possible, but due to the level of difficulty and unreliability (due to jitter and ship momentum) not as viable as other strategies. The proposed changes would fix this.