as to fighters being able to deploy for a limited time cool concept but unless we modify the base rules for thier movement they are not going to have enough time for attack runs ouside of thier own fleets engagement area. and for general munitions lets say this is around 30" max this means that base they would have to be able to fly at least 30" a turn to at least match that envelope really whats needed is a very basic ie not time consuming way to mark manuevering rather than turns that a fighter can spend outside a fighter bay, ie if a fighter is told to take up gaurd station approx 40" from fleet to take on incoming fighters/bombers/space torpedoes then they might be out there for more than a few turns and more than likely they will still have to punch for intercept, incase they miss and other reasons. more later
fighters have unlimited movement, its swarmers that have the limit and you don't want a unit designed primary for defence (normally though "red-shirting").
thought dealing with many swarmers that are defending diffrent ships it might just be better to say they can't move X inchs away from the ship that deployed them, since they could refuel quickly by docking to special docks.