Ray...
I liked your analogy about rearranging the furniture.
Have you ever noticed that when a radio station makes a few subtle changes, the overall sound is fresher...the jocks are more enthusiastic...and the image liners aren't as predictable? Audience feedback (via phone, email or at a remote) about a song, on-air personality, or contest usually occurs. In other words, a few 'audio rearrangements' usually will get a listener more involved and interested in the station. And subsequently, he or she will 'hang around a little longer' to listen to the promos and the commercials! [Which usually pleases the GM, GSM, Program Director and anybody involved in selling radio time].
I still believe there are formats out there that many radio listeners would enjoy! For example, what commercial radio station offers film scores and soundtracks 24/7? A few might provide a couple hours on a Saturday or Sunday night, but the only fulltime sources I'm aware of are connected with XM or Sirrus...which requires a monthly subscriber fee.
As you and I both know...trying something different involves P.R.I.D.E.
Promotion of the new format
Repetition when it comes to alerting listeners when a station is changing format.
Imaging (aka creative promos) to generate listener interest
Dependability when it comes to making promises (aka news on the hour)
Enthusiasm (about the format) from the jocks, the sales department, and anybody who works at the station!
If the staff believes in the format and can avoid any cynicism...listeners not only will respond more positively, but (more than likely) will offer a few creative suggestions of their own?
argytunes