got to say, I'm really enjoying this. I'm about 21 hours in, and it is moving relatively quickly. That's based on vibes though, because for all I know there's a whole other aspect to the games. There's a bunch of tiles I've not completed, which means islands I've not discovered, so there's plenty left, but it runs at more of a pace than I was fearing. It's an easy game, and I could have done far fewer fights and still not struggled.
The plot requires you to find segments of map on these stone tiles, each island is made up of 4 or 5, it's not as daunting as it sounds, and generally when you beat an area you have what you need for the next. However, it is possible to NOT have the tiles you need. There's a fairy thing that will tell you where there's some you're missing, vaguely, and they sort of show up on the map when you're close, but there was a point where I needed to go hunting. What made it an issue is that I'd found a couple of areas that I can't do anything with yet, I assumed they were where the missing pieces were, and they're probably story critical at some point, but one of the pieces was just lay in a cave I hadn't properly revisited, the other 2 were tied to mini quests, nothing too involved. Hopefully it doesn't get any more annoying than that