Right, that's what I've been thinking (emphasis on your first word). What worries me, in this scenario, is: the lighting system, both headlight and taillight, "should be" electrically isolated from the frame/fork. The tighter QR may have made a better electrical connection between the axle and the fork, but if the lights are truly isolated, as they should be, this wouldn't matter... right?
traditionally, lights have not been isolated from the frame. The hub is grounded to the frame, that I know. Headlights nowadays seem to be isolated, but taillights often are not. The Pixeo is not. In fact, some versions come without the ground lug.