The thing is, from what I hear (never played starfire) that fighters there were incredibly efficient in terms firepower/space used. This, obviously begs the questions: If those fighter weapons are so bloody efficient, why do I not put a gazillion of them on my destroyer and blast everything in sight to kingdom come?
In Aurora, things are a bit different. Yes, Missile-Fighters are efficient, but they use the same stuff as everything else. You can easily put a gazillion box-launchers on your cruiser and use them just like a fighter swarm.
At equal tech, it is quite easy to counter a fighter based fleet. Huge res-3 sensor and a gazillion of size 3 to 6 box-launchers (you want to outrange the fighters significantly) with long-range res-3 firecons and ideally good ECM and all the hostile fighters die before they even launch.
Also, as much as I was (and still am) a battletech fan, Aurora has its feet (IMO) rather frirmly in a "realistic" setting. Mecha? No, simply no!