Hi Paul,
One of the challenges in making a good photograph is to keep everything interesting.
Like any situation, you had a few options when it came to making this photograph. If you had moved more to the left chances are we would be looking at more rock face, which would be rather boring. Maintaining the position that you have though has maintained a nice balance between the waterfall, the rock and the flora.
About the only thing I would change would be to turn the camera slightly to the left. This would reveal a little bit more of the greenery on the left-hand side of the frame and would help balance the photograph. Otherwise this is a perfectly acceptable effort.
Cheers, Anthony.