If La Grande does get blown up, I suspect Entercom will go with some derivative of rock. I don't see an urban derived format as very likely.
One issue with 107.5 is that it has 17.5 kw vs the other Cedar Hill stations with 100 kw. It really does not offer a competitive signal in Collin, Denton and Wise counties, particularly as you get farther north. Any change in format has to take into account the coverage and the fact that the station is not doing badly right now.