I worked with two photos taken on holiday in Greece recently - both night portraits taken after a lot of sun, heat and Ouzo.
First of all I applied the Perfectly Clear plug-in, setting it for Portrait defaults and Night Scene Noise Reduction after which I adjusted the settings and saved the resultant Preset.
I couldn't achieve as good a result the 'old-fashioned' way
When I showed the results to my wife, she commented that she preferred the composition of the first but her looks in the second.
So, I took the Auto Selection to roughly outline her head but some parts were excluded, so I then used the Smart Selection Brush (in Add Mode) to include the remainder.
It was then very easy to Copy the Selection and Paste As a Transparent Selection into the better composed photo. Finally I used the Move Tool to align her necklace...
I think this is a great example of the use of the new features but I'm afraid my wife won't let me show you the result

