It seems like the trade-off of extra maneuverability and survive-ability is worth losing a ship over the 7 tie swarms. You have 10 points leftover to up one to an Ace or throw on some p-rockets, which seems like a nice deal.
Also why do Zs generally seem to be preferred to As as blockers and fillers for squads?
It seems like the three points would be worth the giant upgrade on the dial, the boost action, plus what amounts to the 3 point stealth device.