There's absolutely nothing wrong with the composition, superb sense of balance and everything feels right. Some might say it's cluttered but I think that adds to the random feel. I like the fact that you have the pool fully surrounded on all sides. You could experiment with getting lower to the water to really get those trees to show as reflections.
The only thing I can pick on is that this would really benefit from an early start/late evening when you'd get much more vivid light to get more contrast. Sadly without strong directional light a lot of the impact from the scene is lost, which is a terrible shame. If possible I'd certainly plan to get back there on a sunnier day, ideally early if you can and take advantage of such a great scene with much nicer light.