No idea about airstaff.
Musically, just prior to the Frank flip, WRFY seemed to know it was going to be a flip to classic hits and dropped just about everything current. It seemed to my ear that about 95% of RFY was classic rock just prior to and just after Frank appeared. Gradually they moved back to their traditional blend and while they are heavy on good classics you will still hear Goo Goo Dolls, Nickelback, Staind, Jack Johnson, KT Tunstall, et al.
I imagine Frank will chip away a little at WRFY, but once the new wears off and it becomes apparent that they aren't playing anything you don't hear on all the other classic hits stations. Most of what Frank plays gets air on WRFY as well.