Submarine Feedback
For a 'stealth weapon' my particular experience is they are virtually useless..
The battle is over before you get a chance to wet your boots.
I would have like to see them in a midway position prior to battle, at least they might have a chance to fire a torpedo or 2 before the enemy ships are blown out of the water from 12 miles away.
You might have to lose the 'capture' part for a sub but at least they could take an active role in the battle
Possibly consider a 15 second head start