lovejamminoldies, I think your idea is great as well.
WDKF is trying their hands at being the only CHR in town and its not doing well. Part could be due to the weak signal, but other being that its poorly managed at the current time.
Mainline is going to keep WGTZ their home of everything. FLY is doing well financially, and in the core demographics, its not doing bad either. They did lose a lot of the younger end in this last phase, and that may be due to the station hitting the 70's and 80's so hard.
I agree that WDHT should shift a little more mainstream (similar to WNOU), however the mass exodus of youth from 92.9 seems to have found appeal in WDHT.
92.1 is an Urban AC for the most part and is a niche. Im not certain, but its billing is okay as well.
101.5 when that moves in, im not sure whats going to happen could always be a player too. Country is doing okay for them in Clark County, but thats going to be a hard pressed sell in the suburbia of Englewood when the giant WHKO is down the street.