I don't know why the Reds have basically punted Fort Wayne to the Cubs. The Cubs can't seem to find a stable radio home there, and I don't know that the Reds have ever tried.
Even in Indianapolis, MLB coverage is odd. You get a lot of Reds games via FS Indiana, but despite the Cubs and White Sox being in market, CSN Chicago is nowhere to be found on COMCAST cable! You have to get a satellite to watch CSN.