There is a definite "dullness" to the image, which is probably due to the tinting.
It really shouldn't change your workflow.
There seems to be an overall muddy, magenta cast to the image.
Be carefull when trying to adjust the contrast. Try using levels or curves to brighten up the image.
Or, play around with the "Variations" adjustments. You may be able to improve the whole image right from there.
Also, to adjust specific areas and colors, try layering a transparent layer over the image, set to "color". Pick a warmer tint, and carefully color over the areas.