I ran an 18 session campaign of 7th Sea 2e. Beginning, middle, end. It was a fun time. The system didn’t break…but certain subsystems were confusing at times, and the XP system is bolted on in such a way that it doesn’t reproduce the results advertised.
Next time I run it, I’m going to adapt Keys from “The Shadow of Yesterday,” which will greatly enhance the game in regards to thematic systems.