Two reasons why my brain thinks we will (maybe by season 3):
1. People wanna fly more than one.
2. The Phantom shuttle on the Rebels TV show had an overhaul. New engine work, astromech slot and hyperdrive were the obvious upgrades Quarrie's droid installed.
I know this stuff ain't even out yet, but I like the show and I'd like to have two Attack Shuttles flying.... I think having the Astromech will block the turret. (Maybe exchange the turret with the 'mech then have a Chopper astromech upgrade card that adds the boost action.)
FFG can add a little mech slot/hyperdrive to the model with Chopper's orange little head poppin' out, change the exhaust ports, etc.