Quick commentary about Legion XIV not worth its own topic.
After getting the blueprint from the historian, building one, and trying it out, Legion XIV can be used as a missileship instead of a carrier, at least as a flagship. I tried one with two Hammer Barrage or Cyclone Reaper and a variety of needlers (and flak for pd) for weapons. Fighters were all mining pods because they were free and I needed OP for weapons, missiles, and missile hullmods (ECCM and missile racks), plus many mining pods can serve as meat shields. It performed... decently. Would have been great last release. Today, with the current balance, it is clearly not top-tier.
If player wants to use homing missiles, Conquest is probably a better ship, for whatever that is worth. However, if player wants to aim and spam Hammers or Reapers, Legion XIV can do the job.
I am happy Legion XIV is available as a blueprint, even if player can only get it from the historian.
Normal Legion is a warship-and-carrier hybrid. Legion XIV is primarily a missileship that can be used as a carrier, but it is probably best to stick with missiles. I view Legion as a double Champion.