Few more wooden ship suggestions:
Most Ancient ships cost 60 hammers (base). The War Galley costs exactly 34. This seems really out of place. I suggest it be moved back to 60 to match the rest.
Fluyt is part of the cargo ship line (Galley - Cog - Fluyt - Galleon), but it has the "Can Explore Rival Territory" ability. This seems out of place. Is there a reason? Or should can explore rival territory be left to the Caravels?
The ships that are initially coast-bound but can cross oceans later on almost always get this ability at Astronomy. Dragon Ship Pirate gets this ability at Optics. Deliberate decision? I suspect yes, but it did stick out when I made my list.
The Piracy prerequisite for the Sloop of War seems redundant. Piracy is an Ancient technology, and the Compass requirement puts the Sloop of War all the way at the end of the Medieval Era. I would consider dropping the Piracy requirement. The Sloop of War is also really strong for a Medieval-era ship. Its Strength 14 beats out the Strength-10 Fluyt and the Strength-12 Sloop, which are both early Renaissance. Wikipedia's article on the Sloop of War says that those ships date to the 18th century, so I think it should be moved into the Renaissance, probably Navigation + Naval Cannon to match the Frigate.
What is going on with the Spanish Galleon and East Indiaman? They have the "Female unit can't be built but randomly replaces male unit." ability. Especially for the East Indiaman, which is the Dutch Culture Unit, this is strange.
Ship of the Line comes way too late, I think. It requires Military Science, which we have put into the Industrial Era. Could it be moved to Military Tradition or Imperialism?