The news staff at WLW already have jobs. They are not sitting around looking for an entire radio station to run on the side.
There are ten (10) full-time all-news stations in America. They are in markets 1, 2, 3, 4, 6, 8, 9, and 14.
Their websites all list personnel. KOMO in Seattle, the newest and smallest of the group, lists 24 on-air personalities. KNX in LA lists 57 on-air. All the others include various off-air news/info people, and they each claim between 46 and 91 people.
The worst signal in the bunch is 5000 watts at 980 non-directional for KFWB. One other is a high power FM in DC with a 4500 watt AM repeater in a neighboring city. Every one of the eight other stations has 50kW Am at 1070 or lower on the AM dial. (Lower frequencies reach MUCH further than higher.)
Not a one of these stations cracks a 6.5 share, and the median is around 4. That's great in a big market, but in Cincinnati, with fewer stations competing, it just puts you in the range of the average full-power FM station, but with much higher expenses.
All but two of these stations are owned by CBS. Clear Chanel has no experience running the format.
I kow of two part-time all-news stations, those with more than 50% news: WBZ in Boston, all-news until 8pm with an on-air staff of 26, and KQV, Pittsburgh, which claims to be all news but runs talks shows and radio nostalgia shows after 7:30pm. They do have a local staff but they don't say how big it is. They don't share with another station.
KQV is the most similar signal to WSAI. They have a 5kW 1410. They are literally owned or partly owned by an eccentric millionaire. They are professional on air, but recently they have lower ratings than progressive talk got on WSAI. From how the station sounded, Clear Channel didn't think WSAI was worth having even one full-time programming employee, so it's hard to imagine they would hire a bunch of them in order to run the risk of getting even lower ratings than they had.
On top of all this, if all-news went on 1360, the biggest source of any audience would be listeners stolen from WLW.
All-news could happen here in the future. Stations might learn to use automation well to fill more hours with less staff, and non-broadcast competition (ipods etc) could start wiping out FM music stations, intensifying competition in non-music formats. But anything like that is a long way off.