This starship trait does not appear to be working when used on a Jem'Hadar Dreadnought Carrier equipped with attack ships. After I've summoned the 4 max attack ships, the trait does not seem to summon a 5th attack ship. I suspect that the carrier ship maximum for attack ships (4) is overriding the starship trait. Is this intended, or a bug?
(And before anyone points it out, yes, I'm quite aware that there are far better traits to slot over this one. I just thought it would be fun to fly the carrier with essentially 5 attack ships.)