I just thought about something...

Close... first pirate was Testonen, Kyrin's father. And he was a buccaneer. But then again, even though you say there were no pirates, there were no BowMasters, Nightlords, Dark Knights, etc back then, there were Stormcasters, Windbreakers, Firebrands, and Shadowknights. So they could have easily been a sect that specialized in hand-to-hand/knuckle wearing combat, called something other then pirates.

I do doubt they could tie gunsingers in though, but they might. Just hard to say gun technology would stay the same for how many centuries? You cant really get more advanced melee weapons, just different metals and magic infused.

Please do tell me where it says Testonen was a buccaneer, I dont recall reading that, closest I read was he was a "mighty warrior".

And as I said before, Pirates will probably get their dues in another expansion of Masteria, but tacking them in to the Crimsonwood Keep story arc would be, well, tacky. They werent mentioned within the 5 major guilds (I know theres more than those 5), so I doubt they'd be a part of the keep.