Drone carriers are really difficult to kill in full version (Normal difficulty).
Fought a few of them in my last few runs and one thing i noticed is they are much tougher than in beta. Killing all it's drones before new ones appear is a race against the clock, but now the carrier itself has a lot of health meaning we need to bring down the shield multiple times to kill it. In comparaison, the Frigate is fairly easy to deal with since we can always damage it and there are plenty of weak points to abuse of. Not true for the carrier. Also noticed Okkars and G&Bs have a hard time killing one, even when there is a whole squadron of them trying to take it down. My last run ended early due to one carrier (with jammer) i wasn't able to kill before the whole Okkar fleet was on me.