As an example of a bit of seafaring, island-romping fun, this one is a good representative. Every location on the island has something interesting going on although I'll note that much of it might need some lifting done from the GM to provide it with further context or interest - mostly because Crawlers are likely to be careful with monstrous encounters and may simply avoid them entirely if they can.
I agree with other commenters that it might want a twist toward the weird or perhaps some more involvement from the Aboleth at the center of it all that's nice and explicit. There's probably also a tiny bit of room for more treasure or things that players might miss with some more exploration, risk or reward.
Overall I enjoy that this isn't a standard dungeon and while the torch mechanic itself won't be used throughout the entire thing it still provided for the danger levels Shadowdark uses.