You should really primarily post TG stuff at this place, the real TG community! FB is on its decline anyway
Anyway, I like what you've done here. Especially the composition and the lower grounds are really nice. Pancake rocks are interesting. Is this to be reality or imaginary? I really don't know if such rocks exist in this form, but I would at least decrease the lateral displacements, so they appear a little more natural (that would be my instinct).
Then I'd add a lot more fine groundcover on the rock plateau at the right, between the trees. Shrub maybe too.
I would also push the mist back from the camera to only the distance, a 100m would do, I guess. Multiply (blue node) any mist mask by a distance shader.
Then I would rotate the left one of the 3 fallen trees that lie in opposite directions maybe 45º, so they aren't in such straight opposite lines.
