Hello Joshua, I have a couple of comments for you.
The low light (shaded light) is providing a blueish tone to the photo. Also, some of the details in the lower part of the image are lost (or are pretty near lost). I recommend using a warming filter (81A in this instance) to offset a bit of the blueish tone, and as well, I might recommend (and this is given that I do not know your distance to the falls) F8-F11 with an overexposure of 1 - 1 1/2 stops for what the meter tells you.
As well, you can bracket +-1/2 stop for slide, and 1-1/2+- for print to ensure you get a good snapshot of this.
I love the vertical in this shot because it gives a great sense of height to the photo. I just think with a bit more work this will be a definate wall hanger.
0 
