I am so going back to Tassy
I know what you mean!
The Ronny's creek walk is absolutely great, to be able to walk through such variations in vegetation and terrain is incredible. To be able to walk through grasslands, rainforest, rocky mountain trails, tassie bush and see multiple lakes all in the space of a few hours is awesome!
I remember that waterfall, where you are standing is a little wooden platform and walkway
in regard to PP on the picture, I would give a d-lightning a go and also play with the white balance of the image, this pictures looks quite cool, which is not necessarily a bad thing for waterfall shots.
The waterfall definitely had more water in it then when I was there...