My modest opinion is if want to change it, need to choose if ships will move in combat mode, as snub aux, or move to transportation mode.
If goes to PvP, maybe made them like smaller gb's.
If goes to transport direction, they should be made plus faster than transports, i thinks so faster only LF could catch them, so makes sense you use them instead big, slow transports on dangerous áreas. Those were my 2 cents on that.