A flechette launching pod very similar to that is actually something I've been experimenting with since this post went up. It'll be one of the secondary weapons.
Viewing post in Progress Report - Chateau, Weapons, Tweaks, LSDTV comments
Speaking of kinetic weapons... What about an "air support" option, where an orbiting warship drops a tungsten "arrow" to the requested coordinates? Yes, I know they have relatively little destructive power, but the cool thing is that they're highly accurate and have a relatively small kill radius, yet they quickly destroy large targets like command centers, giving them no time to call for reinforcements.