I really like it. I'm a big fan of isolated/calm photos overseeing water. I have 3 photos now like that! I think the composition is really strong here.
I don't think its a contrast issue here so much as it is the photo is underexposed. It looks like you exposed for the fountain which was the brightest area. I also feel the shot would have more impact if it had been shot slightly more form the left, then you would have captured all the water movement from the fountain. I also find the house in the trees to be a bit distracting. Just my opinion.