Speaking specifically towards the barbarian pirates spawned by the Lanun. On the one hand, I enjoy how they make the sea an active place. Navies have to be maintained, stationed all along the settled coast to protect fishing villages. A constant vigil has to be kept up lest they sneak in and pillage without notice. On the other hand, its bloody annoying. Depending on proximity to the Lanun, even the best coastal defense can be mired by the constant deluge of pirates. The pirates, being ocean capable, are also rather difficult to respond to until optics is researched. I've had games where I have had to give up on any coastal advancement. What this does is plant a giant cross-hair on the Lanun civ. Regardless of how they feel about you or you about them, they simply have to go. But, as I said earlier, I do kind of like the extra activity on the sea. Perhaps adjusting the spawn rates/number spawnable would help. Making the pirates a tad weaker earlier on would also help. Might also be worthwhile to keep them from spawning until the Lanun player has researched optics. This would help protect from an early swarm of pirates before player even has a chance to get sailing.