Have been looking at it for ages. I know I have one tree that's floating, will sort that. I also have no shadows showing despite having sun shadows turned up to 100% and I can't understand why, surely the trees on the right would cast some shadows down the slope? Apart from that it is just missing something, and I can't fathom it. I had thought about more flowers on the slope, but the other half reminds me the rabbits would make short work of them. I call it "communing with nature"

hi, i hope you'll forgive the presumption, i had a fiddle with the image in paintshop to illustrate my suggestions. i saw it as a sunset/early dawn image. personally i think the content is complete and just some adjustment of the lighting would give the required affect. i think you have a good idea here and will love to see the final image.

It appears that you've set the ambience of the grass too high. The shadows get lost then. The trunk is also suspicious looking. As to what's missing, I think that the pic lacks a focus, compositionally speaking. Everything has the same value, so the eye wanders around. Ummm, I agree with rj, try putting a spotlight to light the woman.