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Butterfly Girl: Changing the background color to a complementary one makes her pop more. Adding a little more detail to her hands and her right arm and hand helped with that perspective.
Peacock Strut: Moving the dark tree/rocks to the right and extending the lighter rock behind the peacock and bringing the rock further across the page eliminated the weird angles. I generally played around with the peacock feathers and body.
Last Leaves of Fall: Adding an additional leaf cluster at the lower right corner gives me a better composition (rule of threes).