As many have said before...the military slots really gimp the whole lineup, albeit the Chieftain and Challenger are both capable combat ships with them.
I have to wonder if the solution to military slots isn't their removal (something I personally am ok with) but, rather, there were more beneficial modules for combat vessels that go beyond raw stats. Automatic reloaders, ammo storage, SLF or SRV buffs for combat...right now, the modules are checks notes...
Good for increasing hit points.
That's kind of lame.
Bad idea #1: just buff combat ships the missing hull hit points in their shields and/or hull and call it a day.
Bad Idea #2: Use military slots for something other than hit points...like agility increases, or stronger interdiction, or just open the slots.
Bad Idea #3: Stop using optional internals for balancing entirely. Give raw stat increases/decreases and leave options for what the name implies: options.