I'd like to see the subject more to the right, and lower, in the frame; the Rule of Thirds would work here and strengthen the shot. I also think there's too much "weight" at the bottom of the frame and too little headroom at the top.
The little cairn I like as a subordinate element, personally. I think it lends a degree of perspective to the waterfall and it's just kind of... I don't know... Humanizing in some way. It's almost cute.
Then we come to that rock at the verrry bottom left of the frame, right smack in the corner... That's "junk" (my catchy phrase for a distracting, weakening subordinate element) and needs to go. Be careful, in particular, of corners and edges of the frame and keep them as clean as possible.
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