EU4 will only succeed if it has MM's pirate system!
I just looked up what that is, and the Corsairs were largely the state arsenal of the Barbary states, not random pirates. The most famous example executed nobles Charles V tried to ransom, then when he offered a smaller ransom for their bodies chopped them up and dumped them into the sea; not the action of simple pirates out for money. The Knights should be essential to any euro state that intends to have an economy in that area; instead of a useless lump.