[Suicide Junkie]

#2:
Not really. Each round, look at what your ship has left. It dosen't matter how it got that way, just the fact that you have no MC, no LS no CQ, means you get 1/8th movement. Having no control components whatsoever means 1/16th movement.
So, having/not having the Aux con in that situation would only make a difference for ships with 16 movement points or more in combat.

#3, & #4:
The A.S. effect does not hang around. If there is an MC intact at the time it hits, it does zilch. End of story. Any player will put the CV first, just to make sure the MC is destroyed before the A.S. tries its luck.