Remember, the presets are intended as a starting point for stations with a competent technical staff. There are so many variables in a station's audio chain that will, to some extent, color the sound that presets can't always take those factors into account. So the usual process is to try various presets and then do fine tuning on the one that is best liked.
Of course, it helps a lot to get a group of station staff members who are in the station's target demo to listen and comment and "score" each setting. An AC station targeting 30-50 year old women won't sound at its best if the 55 year old male engineer does the adjusting. As hearing and audio preferences vary by age, gender and music preferences, it's really critical to have some people who represent the target audience help the engineers to make the best settings.