An easy solution would be for Joe to join Marty and what's-his-name in the booth as a third announcer for home games - when he feels like it.
Not doing play by play, which has always been Joe's weak point, but simply adding color commentary while the other two guys do the heavy lifting.
As for Lindner, is it possible that he resents Joe's status as a local icon? It must be galling to him to be held in contempt by many, despite what he sees as a lifetime of philanthropy, while a blue-collar type from Hamilton is perhaps the most beloved man in the Tri-State.
And remember, there were credible media reports last winter that Uncle Carl tried to persuade Allen to hire the husband of Lindner's secretary as Joe's replacement.