Just read issue 13 of the comic. It's surprising that the big time-jump required for this story to be after Magical Mystery Cure wasn't acknowledged at all, nor is any explanation for Twilight's new appearance provided to potential comic-only readers. With the start of this issue, we get the beach story that tons of people were looking forward to. I like the modifications to the character designs, including the flowers in Applejack's hair and the shells in Fluttershy's hair at the start, and Twilight's glasses later on. In general, Fluttershy was really adorable in this story, especially when she seemed to be blushing when held by Hoofbeard, though her clinginess to the fish didn't feel right, even if people say it follows her behavior in "Best Night Ever". In One Piece fashion, it seems like "pirates" are more like adventurers by default instead of criminals, given everyone's willingness to go along with Hoofbeard.
The presence of pirate look-alikes of the Cutie Mark Crusaders, Big Mac, and Granny Smith was very odd. Is it a joke about how since there are so many clones of background characters, then there surely must be clones of the side characters? In the first shot of the bar, you can see a Luffy pony in top left corner (standing next to possibly a Nami pony), and Zoro and Sanji being surprisingly friendly in the bottom right. Given the semi-famous Robot Chicken sketch, Apocalypse Ponies, it was surprising to see Rainbow introduce her group as the Four Ponies of the Apocalypse. There is a Goonies reference in the bar fight, with Rainbow yelling out, "Heeey yooou guuuys!", and there is a reference to the Pirates of the Caribbean ride with Twilight, Rarity, and Pinkie being chased by then chasing hoodlums. In general, the entire bar fight sequence was great. It was also good to see Princess Twilight actually being acknowledged, with the bar hoodlums wanting to take her hostage, followed by Twilight easily zapping them all into submission.
The idea of Hoofbeard being on a quest for a moving X is quite clever, and I'm going to guess there will be a few Moby Dick references in the next issue regarding it. It's amusing how the issue ended with a giant ghost crab out of nowhere with Rarity present, but the writer stated that she had no idea Rarity vs. Giant Crabs was a thing. So, it's probably going to be Pinkie that solves the problem, given her crab obsession at the start of the story.
Oddly enough, despite featuring the first comic appearance of Princess Twilight and having Rainbow Dash most prominently on the cover, it felt like the main focus character was actually Fluttershy. Overall, this was a very fun and enjoyable story, though Fluttershy's characterization felt off. Plus, surprise surprise, Twilight being a princess in the comics didn't make things implode.