I am sure there is some reason they released it first, but I don't know what that is. It might be that they didn't want to take a chance and have something go wrong.

Notice how jagged the shorelines are? On Earth, I would say that such a lake or sea has been recently flooded. On Titan, maybe the ‘rock’ (Water ice and other ices) doesn’t erode as quickly as our rock does on Earth. Or maybe liquid methane doesn’t have the erosional strength as or water. More likely, the methane cycle on Titan is not as active as the water cycle on Earth. After all, Titan gets less solar energy than the Earth.