A ship attacks Quicdraw. Quickdraw uses Elusiveness during the Defender Modifies Attack Dice Step and receives 1 stress token. Quickdraw triggers Electronic Baffle, removes the stress token and loses 1 shield.
Question 1:
Quickdraw's pilot ability says "Once per round, when you lose a shield token, you may perform a primary weapon attack." In the scenario described, should Quickdraw's extra attack be resolved before resolving the original attack against Quickdraw? I believe the answer is YES, because Quidraw's ability says "when you lose a shield token" rather than "after defending." If you wait until after defending, then the opportunity of "when you lose a shield token" is missed, regardless of the results of the attack against Quickdraw.
Question 2:
Assuming the answer to Question 1 is YES: what happens if Quickdraw destroys the original attacker? According to the timing chart, the enemy ship should be removed from play unless Simultaneous Attack Rule applies. This would leave the original attack against Quickdraw unresolved. As a fan of Quickdraw, this would be awesome.
Advocating for the other side; current rules do not explicitly cover this scenario. I believe it is reasonable to apply the principle of the Simultaneous Attack Rule, even if the attacker is not the same pilot skill as Quickdraw. Regardless of pilot skill, Quickdraw's extra attack interrupted the original attack; the attacks effectivley happen simultaneously. This interpretation would allow the original attacker to resolve its turn as Active Ship in the Combat Phase, before being removed from play.