How about an action kinda like Marksmanship, that you declare as an action, except before you fire you can perform a Boost action. Then you can be out of range 3 for an enemy attack (especially a turret attack), then boost in for a shot?
You may be onto something here. The ability to take an action to turn all eyeballs into evades on defense would help a lot against those Gunners, at the cost of not affecting offense.