Well the water in limsa does not look at that bad, it is very choppy and not transparent. Corethas lakes are very calm and the water is not clear. The river in corethas look real good in my opinion, and the crystal clear creek things in grid are top notch.

The only water that fails completely is the boat, and the ocean is too calm need more waves and what not as it gets closer to land. Besides that I see nothing wrong with the water.