The general recommendation is to avoid flair, but I like it sometimes, like here. Unfortunately if can wash out important parts of the image. I would try burning in the falls and some of the area around it. If you do it fairly evenly, you will still get the "ray" affect, but be able to see the detail better.
I like the composition. Some of the lighter leaves at the bottom and left are a little distracting, but if you crop those out you lose the human figure, which I think it kind of cool to have in there for scale.
Nice job!