Vincent, this is a good perspective on the falls but I have to agree with Teunis, you could crop out a lot of sky and make this a better composition. And a frame would really enhance the right side, I'd agree. Did you try doing anything with levels to enhance the contrast at all? That's the only other thing I could think of to improve this, unless you were going for a softer look.
Héhé, Vincent, that's a shot I never saw :-). If I were you, I would try to add a black frame (a small one) to "lock" the image. The right side is very clear, and it's not easy for the eye to be kept in the image. Very interesting point of view, anyway. Regards. Y