Crazy idea, but wouldn't it be more fitting for the federation to have a "combat turret-deployment vehicle"?
There'd be a lot of balancing required, but this seems to:
- give the federation a cool new toy.
- give the klingons something else to worry about.
- does not (necessarily) lead to a million new npcs on the map.
- enforces the idea that the federation are primarily defending their own borders, not building warships to conquer the galaxy, nor are they sending their personnel out to die like flies.
Add a holoship deployment ship instead.
Because, why use fighters or turrets if you can summon whole holo battleships at will?