During the entire time that the station was in a classic hits format, it was also in a trust set up to administer the stations that had to be sold in the aftermath of the Cumulus privatization in 2007.
Since it was Cumulus' intent to sell to an operator who would remove it from direct competition, they were not very interested in spending money on promotion. Still, it averaged a 3 share in that period. Given it's limited coverage, that is the equivalent of a 5 share format for a full C signal.
Of course, now you are arguing with the laws of physics.
80% of in home and at work listening (which is 2/3 of all listening) takes place inside the 70 dbu contour. 95% takes place inside the 65 dbu contour. That is simply because weaker signals do not penetrate structures well enough for the average consumer radio of today to pick them up. The radio-locator red inner contour is roughly the 60 dbu curve... much more optimistic than reality shows is possible.
Since the Nashville Metro Survey Area is 8 counties, and the home county, Davidson, has less than half of the total, full coverage is more important in that market than in most others. 97.1, as a not even a full C2, does not make the grade in that respect.
You want to blame the format and Cumulus, when the real issues were the signal and the legal requirement to spin off the station.