I stopped around the time I got the diving bell to clear up the rest of the collectibles, upgrade the Jackdaw, get the Templar armor, pretty much everything I could do. It was super fun. Now it's back to the story, and it turns out the next thing I have to do is a ship tailing mission. It's awful. Am I going to see anything new or interesting gameplay-wise by finishing the main missions, or should I just call it quits now?