I recently tried to fight an empire list consisting of 8 TIE fighters or 7 if played with Howlrunner and it's quite unbeatable ! It seems that a no-brain weenie swarm is better than 3 or 4 elite pilots with more firepower.
Is this a flaw in the game? I'm going to suggest to my partners to make all pilots unique (even unnamed). This could limit the lists to 6 ships. But there's no such houserule in tournaments. So do TIE swarm win most tournaments?