The vole is nice and sharp right where it needs to be. If moving around was possible I would recommend a stronger composition by moving in tighter (zoom or move position) and eliminating much of the OOF tree stump he is in. The large OOF part is distracting and grabs attention from the vole.
Moving up some could have gotten the BG completely in the bright section and moving down the BG completely in the darker area. As it is now, the division from light to dark BG is right in line with the vole.
Moving would possibly helped with that shadow on the vole.