I dropped this for a few weeks, but I've caught up to the end of Chapter 5 as well now. It's good that there's been plenty of exposition and character development and Guybrush Jack is still only on Melee Island.
Like Gins, I caught a reference to a real-life pirate I missed last time round - I probably thought he was fictional. Mine was Stede Bonnet, who I only know from watching the slightly disappointing sitcom Our Flag Means Death. I wonder if he'll come into it again? I can't remember!