What do you think?

https://fstoppers.com/photo/82740

What do you think of my attempt of photographing and editing the Seljalandsfoss?

I've got the following questions:
-How would you deal with the mud between the grass in the foreground?
Leave it the way it is/ Mask it out (How would you do that?)
-Could the Cliffs on the right use a little more red/orange or is the saturation just right?
-The same about the blue in the sky, darker blue or just right? And more orange where the sun shines into the clouds, or just right?
-How about the greens? Less saturation?
-Do you have any other advice/input on the edit?