In a reversal of the way these things usually go, Cincinnati’s all-classical public radio station, WGUC, has purchased WVXU, the city’s powerful public news and information station, along with the three-state network it was attached to. The merger has the potential to make WGUC a major force in the increasingly ratings-driven world of public radio, but unlike in so many other markets, where classical stations have been eliminated or converted to news/talk, the consolidation would seem to strengthen the place of classical music on Cincinnati’s air.