Scaling defense of ships to prevent swarm attacks.

What about scaling defensive items by ship size?  If Consider tiny swarms taking out a huge ships.  What if defense scaled.  For example armor on a tiny ship would be 5 points Def, 6 for small, 10 for medium, 12 for large and 16 for huge....  It would represent more area for armor, or power for shields etc...  I win too many battle versus large and bigger ships by virtue of swarming with tiny ships...  Has this been brought up?