I would like to see something that hurts up close for a squid. The flame used to fill that role, but now it takes too long for a hit and run and isn't reliable enough for a sustained chase.
Oh goodness, potential new gun ideas.
I've got a cool-sounding steampunk-ish name for it:
Kinetic Silver Revolver
Perhaps a cross between a shotgun and revolver weapon which does more damage the faster your ship is going. That would open up some hit-and run options for a squid, and be useful on other ships as well.
Annyways, another thought that has bubbled up off the top of my head: as far as weapon-balance goes, I'm not really see banshees used a whole lot. It may be just because of the current gat/flak meta. I'm not sure if banshees need an outright buff, or if they just need a better appeal. I think they are decent all-rounders, but usually ships are specialized, so they don't quite fit in in my opinion.