What I was trying to say is to give it a stronger signal. I know that, inside most buildings, a simple antenna is going to have a harder time picking up a lower-frequency station than a higher one. Maybe our receiver where I used to work just had a junky antenna, but all we could get in through it was 102.1, 104.1, 105.7, and 106.5. I could maybe get 102.7 to come in if I angled the antenna cord just right, but that was the extent of it. It could also just have been the part of town we were in, too.
I thought the higher frequency numbers meant stronger signals, but I might be wrong in that. It might also depend on the antenna and other things interfering with reception.
As far as moving formats around, I don't think it would be as problematic as people think it would. Between running social media ads and getting stories on the news about it, I think people would know that a change is happening on a certain date. It worked back in 1994 when Fox and CBS switched affiliates here in town, and again later when The WB jumped ship from 43 to 55, so why wouldn't it work almost 30 years later when information is more readily available than ever?