I'm inclined to kind of disagree, while the leaf wings could blend into the body to make it a little less disjointed, I really love the look of the creature to the right and I think in its case not too much depth/contrast works.
I think the problem is that it doesnt slot easily into the composition as a whole, mainly because the missile trail has a much higher contrast than anything else.
I think its just a case of despite everything looking lovely individually, something has to change for all the elements to cohere.