Troll-free zone | 1500px max for photos | Play nice!
This is a very pleasing image Mark. The near and far are nicely balanced. There's a slidht diagonal from the falls on the lower left to the slightly offset to the right upper falls. The leaves on the rocks make for a nice entry into the picture. You could stop here and be a very satisfied photographer.
In a perfect world, you might want to experiment with shorter and longer shutter speeds. I just wonder if a shorter shutter speed might lend a bit more texture to the falls, especially the background water. Or you might find that one shutter speed works better for the closer water and a different shutter speed works better for the further away water. Just food for thought...
In addition, consider a slight vignette around the image and perhaps a little bit of extra light on the two sets of falls.
Not much to do to improve this photo. It's already quite good.