Newp, pirates tended to prefer faster, shallow draft ships, and I entirely agree that the pirates should be limited to smallerish craft and raiding methods... no line battles etc.
But, in the same vein, the 'Golden Age of Piracy' only peaked around 1726.... so throwing in ships designed 1812 and onward is far out of reach of plausibility. And really, there was only ever one Victory, one Santisima, one Constitution... the idea of popping into a battle with 25 of any of them is ludicrous.
In the end though, if the nation players want to start counting beans, you have to count all of them, not just the ones that suit you.