I have not had much luck with the REAL fine tuning aspects of color correction. What would be the best way to correct an interview subject with somewhat rosey cheeks or a flushed look? Any direction, suggestions, or opinions are always appreciated!

The best thing to do in that situation would be to use the secondary color corrector. Select the color of the cheaks, adjust your values to get as much or as little of the skin tone as you need, and then use either the color wheel or the HS values to correct the cheaks to a more natural color.