According to the FCC database, WWBC has a CP with 50K daytime, 25K critical hours using two towers, with the signal nulled away from the 1510 in Nashville, TN (WLAC). I would guess it will give them better signal penetration in buildings and less interference early a.m. from WLAC, as their signal sometimes booms in down here.
Also at the time of radio allocations and assignments back in the 1920's and 30's the population of FL was much smaller, most of the people here moved down from "up north" on vacation or to help build the infrastructure here, so the clear channels probably served them with news from back north, etc... However today, with considerable interference here from computers to border blasters, along with the ever sprawling suburbs, has resulted in many stations over the past few years increasing their signal wherever possible.