It looks good, overall. A couple things I would have done.
1. I'd have shot the falls at more of an angle, to start. With it being head on, I think you lose some of the sense of depth and shape, where as with a more oblique angle, you'd pick all of that up a bit more. Maybe just ever so slightly increase the elevation of the camera as well, and point it just ever so slightly downward. Again, to help improve the sense of depth.
2. I'd have exposed for longer. The current exposure is just barely on the edge of long enough to accentuate the sense of "flow" in the water. A longer exposure would enhance the dreamy effect, and help smooth out the scene overall, and accentuate that flowing sense of water more.