Just for the record I don't believe any ('exotic'?) ship is 'insta countered' by carronade. Carrofishes excel at controlling opponents from afar, but their gun and balloon is as fat as any, and they will succumb to prolonged focus fire unless they get off the enemy's arcs every so often. Likewise, galleon has a fuckton of weaknesses. I get that dying after 3 mins of constant balloon popping is frustrating but there are ways to counterattack and/or escape, and this isn't a 1v1 game anyway.
Carronade is a strong gun, there's no arguing that. From popping your balloon to actually killing you, though, it needs circumstances which require quite some time to happen (get close to obstacles, with at least some armor damage while fish is healthy enough to successfuly ram etc), at least some of which can be more or less mitigated (avoid parking next to obstacles, stay high, use drogue, shoot back, use a small carronade yourself, ask for ally support etc). Balloons in general are a huge damage shield. Quick rebuilds essentially force the carro's damage to not be redirected to your hull. When a pyra's hull breaks you'll see 3 people run to it even in pubs, yet when a goldfish's balloon is popped from a carrofish the common case scenario is to have a poor buffwrench guy try to patch it up by himself.
I'm a terrible pilot so this isn't some attempt of mine to act smart by telling you how bad you are to die to carronade. But I've seen ships get out of seemingly ominous, long-lasting balloon locks and turn the fight around pretty often.
Anyway, a minor decrease in damage could make somewhat easier to fight against.