Unfortunately there is one other photo of a marsupial and their detail is crisper and the tighter crop does add to the image. This photograph looks a little snapshotty, probably because the shadow is obscuring the main focus of the image, namely the joey.
Shadows are too harsh. You have to look very very closly to even see there is a baby in the photo. Some dodging may help but the diffrence in light is so extream I don't know if there is any way you could save this photo.