Let's see, what's that old saying? "Stop beating a dead horse?"
The sports, business reports, fluff stories, weather are all recorded and broadcast over and over. You don't need a live news reader to intro and outro them except for the top and bottom of the hour. The traffic every 10 minutes is live. Hey, they even give time-checks in the recorded segments. The only thing missing? The current temperature except at the two live segments. The normal non-radio geek listener dos not know the difference and certainly does not care.
And the importance of this? KYW only had to eliminate two positions instead of four. So Julius, if you want to see more people at KYW hit the unemployment line, keep begging them to be live over night. There will be more part timers (i.e. no benefits) and still fewer full time staffers. Go live at night and the overall quality of the most expensive format on the radio goes down, decreasing revenue even more.