Improvement or interpretation?

The following image has undergone some processing similar to traditional dodging and burning. I have isolated the figure and pallet using the polygonal lasso tool and feathered the edge of the selection by a few pixels in an attempt to soften the edge of the cut-out. Then I have worked with a levels adjustment layer,  the objective being to lightening the figure.

I have tried to lighten the figure without the end result looking 'false'. I think this has worked very well.

Portrait with selection altered with levels.

The exercise is again asking me to consider the limits of this image manipulation. I find the level of work carried out here quite acceptable. Even if I had lightened the figure more, I don't feel it is telling an 'un-truth' although the image will look false. My reasoning for this is that the image is still displayed as it was seen albeit a little lighter.

This is of course all highly subjective. Other photographers my have different opinions. My own opinions differ depending on the final use of the image.