Celebrim
Legend
So, one fun fact that I only picked up from a Youtube video today - that twin-hulled TIE that's launched to pursue the Haulcraft isn't actually a TIE Bomber (you can tell by the lack of underslung warhead launcher). It's a rarely-seen TIE Boarding Craft, its secondary hull carrying a boarding team rather than munitions.
Yeah, I watched the same video. I honestly had forgotten about the existence of the Tie/Br and was surprised to see it canonized. While the Tie/Br is barely suitable for customs inspections, I wouldn't want to assault a pirate ship with one. And it doesn't really address my issues with the lack of firepower. At least a Tie/sa can actually disable a large craft.
Point being, it's really easy to see why the Empire didn't build a ton of the Cantwell class. The only thing it would be good at is harassing law abiding citizens and the most petty sorts of criminals, and for that job it's massive overkill. And because it is massive overkill, you couldn't build enough of them to actually provide an effective blockade against petty crime.