No but, the CMA notwithstanding:
See this link. There are three K-FROG country stations in locations that surround L.A. County. Together, the K-FROG stations reach the entire Southern California area, including the L.A. market. Undoubtedly the K-FROG stations will be the beneficiary of KZLA going to a different format.
In the meantime, instead of being unique within the L.A. market, KZLA becomes just another pop/urban music station in a market croweded with them.
I suppose you could still argue that none of them is an "area-wide" station, since their patterns don't cover west L.A., Santa Monica, or Malibu. But, from a realistic standpoint, it wouldn't matter much because THE country music fan out there doesn't listen to the radio much, anyway.