The Rogues got Destroyers due to their close ties with the Mollys, who have the access to the resources to manufacture much larger ships, while the Rogues have the idea on what they'll be up against.
The IMG have a gunboat for security and a Battlecruiser that is designed specifically for extreme deep space exploration and frontier travel, well beyond the borders.
Zoners have a mobile freeport which shouldn't have Battleship guns, and a Carrier that shouldn't exist. The Q-Ship is for all intent and purposes just a reinforced and well armed transport re-imagined for security of stations and long distance convoys through Outcast or Corsair space, who are known to pirate/kill people who trespass in their territory unannounced and uninvited.
Gallia was made to look pretty and be interesting. It only succeeds at one of those. You can guess which one by looking at how active it is.
Currently unable to consistently be present in the Community due to life constraints.