I think they put a cost on that ability in the latest patch... And really, it's usually just a few frigates and maybe two cruisers, not worth the research cost and time that is required O,oTheo Samaritan said:Vasari in Sins of a Solar Empire. They are not overpowered as such, nor can they overcap. However they have an ability you can unlock called "dark armada" which, if used right, basically gives you a fleets worth of free ship replacements every twenty minutes or so.
So not only do they get a lot of free ships, they get them quicker than anyone else can build a similar force.
Then again, the Vasari got their Superweapon extremly upgraded in Entrenchment... Now it both disables all enemy units around the planet, AND creates a temporary phase-stabilizer node at the planet you shot at, allowing your fleet to warp to it directly, pretty much enabling you to strike in the middle of the enemy empire.