I expected swimming to have more to it in SB tbh especially since Othard has the largest ocean/sea based map in-game.

If they ever implement sea/sky sailing archeage and BDO are great examples as mentioned by Hycinthus above. Maybe have OW bosses in the sea (in the form of FATEs maybe?) that you can use abilities/boat skills on (kraken in Hullbreaker for example) or fighting sky pirates for treasure on uncharted sky isles (you are an adventurer after all) that might even be something to use company airships on? Who knows, I'm spitballing afterball