Judging from the artists involved, a lot of them wouldn't fit in with WFLZ usual programming. Some of them would, but many of them would not. Also, WMTX is much lower in the ratings. WFLZ and WPOI are neck and neck, I'm sure CC doesn't want to mess with a good thing and risk falling too far behind WPOI...
Now, all of what I just said could be total crap... but it makes sense to me...