I like the idea of the pilings used to funnel the water. As for the smith and bakery, you could set them close to the water and/or make the part of the platform they're on simply as close to the water as possible, even lowering the part of the platform each building is on. That way you don't need a new platform, and there's ready, immediate access to a lot of water to put out any fires. Looking at the smith building right now, it would be a simple matter of shifting the south and west platform edges closer to the building, or just adding some indication of stairs or something to show that that part of the platform is lower.
I have no idea if I'm even making sense, sorry XoX

I love you're buildings, and I'm very impressed with how this is looking! I like the fish idea on the shield ^-^ Other than the obvious connection to water, is there another reason for choosing a fish? Bit of a world-/culture building question, but you already have such great details about so much! Keep it up ^-^

- kes