Actually Annatar, in Gameplay.constants you can play around with accuracy against frigate/capitals as well. Under the "ChanceToHitTargetType" lines one of the entries is "CAPITALSHIP" which applies to both capital ships and frigates oddly enough. Currently it is set at 1.000, for 100% accuracy, which mean the Akkan's Targeting Uplink is less useful than you think, as it only provides relatively small range buffs and the accuracy is only useful in asteroid belts.
However, if that accuracy was set to less than 100% for those weapons, then everyone would want the Akkan as it would give a definite edge in battles.
Also, having weapons with less than perfect accuracy is just good RTS design, especially in space where it is easy to miss targets.