I think it's a case of the new direction the station has gone in. A true Mainstream A/C for 2010.
The powers have decided that a more music and consistent sound round the clock is the way to go.
To complete the job, the station should dump Delilah and allow Kristy O'Brian to have a show again, even if it's at night.
With technology, that doesn't mean Kristy would have to be live.