It looks like port battle encounters are getting some new additions in patch 1.19. Not only are the current encounters getting their own swashbuckling rooms, but two brand new maps are being released in the upcoming milestone. The two new encounters are Jawbone Bay and Savage Cliffs.

Lum said in a devlog entry that the new maps are "are both slightly more likely to appear in the random selection than the older maps are." The Flying Lab team is also working on more new maps, which should be added to Pirates of the Burning Sea in the coming months. Check out the entry for more details on the port battle encounter changes coming in 1.19.