As "radio freaks", many of us really love big-signal coverage, but easily the most important things to the broadcaster (jockeying for position with a multi-million dollar property) have to be ratings and revenue. WQOK has to be laser-focused on the Raleigh-Durham market, for both. Last I knew, that metro includes only Wake, Durham, Chatham, Orange and Franklin counties (nothing in VA... in fact Person, Granville, Warren and Halifax counties are outside the metro.) In addition, it's important to remember that the great majority of black listeners in the metro are located in the cities of Raleigh and Durham.
It might not seem logical, but focusing on those areas is hugely important for a few reasons. First, potential clients in places like Danville and South Boston can very seldom afford to pay the rates typical of a successful station in the Raleigh market, so no account executives are assigned to those areas. Second, whether the station has a 90% share in VA or a 0% share, the ratings in the metro stay exactly the same. Meanwhile, 'QOK's present tower doesn't put a city-grade signal over all of Durham... and barely any of Raleigh (to clarify, 'QOK doesn't city-grade I-40 at any point!).
From the new tower, they'll city-grade all of Durham with ease, plus all of Raleigh. Of course, it's possible that the application is just a move to prevent some other station's application from being approved... but the tower site move (and power reduction) *would* make a very noticeable difference in WQOK's target areas. The station will jump off the dial on cheap radios, especially in lower level homes and apartments.
This really could lead to better (and more stable) ratings.