Jack Edwards is doing purely regional broadcasts. He is specifically linked to one team (like Bowen used to be.)
What Rogers is doing now is assembling a team of broadcasters without that "regional" feel. They are all professional and none of them are biased and, in theory, they could be interchangeable. When the Senators face the Maple Leafs on Rogers, it makes no difference what broadcast team handles the game, they are interchangeable.
There is no way in hell Joe Bowen could do that. But Bowen's lack of professionalism extends beyond his Maple Leaf cheerleaders and lack of knowledge about the rest of the league. He often goes on long rambles that he thinks are quite amusing that often have very little to do with game he is supposed to be calling. Judging by this thread, some people really like that folksy nonsense but others find it annoying and inappropriate and, frankly, completely unprofessional. Listening to a game called by Joe Bowen is like watching the game with your ill-informed drunk uncle.