Sadly, the pirates, while playable, and fairly unplayable, due to everyone being permanently at war with them and a stacking limit of six for units and ships.
In particular, the Italian states seem quite full-featured in terms of intro text and goals, almost as if they were cut at the last minute. It’s a mere few days since Empire: Total War was released and already the moders over on have worked out how to unlock all of the minor powers! Want to play Savoy? The Barbary states? American Indian nations? Now you can! It’s early days for the mod so there are some issues, but when I tried it there were no major problems.
I suggest visiting the linked sites and having a poke around for more recent mods before you install this one, just in case! And always back up, you can back up *WARNING* *WARNING* This mod is now months old and may not work with a current version of E:TW.