I tried redoing the cloning on this phoebe shot to hopefully get more detail. Also I added a little more room all around and cloned out the OOF branch in the ULC. Is this an improvement? You can see the original here.
With those bg I normally try making a layer and using some Gaussian blur then a mask to erase the parts I don't want. btw the effect should be subtle, just something that could have been done using a fast lens wide open !!