1. Bad lighting/contrast
2. Not much done except opacity reduced on fractals.
3. Lack of depth.
4. Render looks slapped on to an ugly BG
No fractals used...Just smudging and brushing

BG was blurred a lot to help to try to create depth (might have blurred it a bit too much though?)
Never did much with the lighting.
I can send you the .psd if you actually want to see what all I did

or you can tweak it and show me what you think i should have done.