That's what I was thinking....the people we are listening to on TV have been there and played the game.....not 100% of them, but a lot of them have and that's the credentials used to at least get the interview for their job
I get what you are saying, but I think hockey is just too fast paced of a game for there to be an "equivalent" to the Manning-cast; football is slow with lots of time between plays (the reason I stopped watching it 5+ years ago).
While I agree that there can be more behind the scenes insights and personality brought to the broadcast booth; and more technical "John Madden" style analysis to help fans understand the nuance, strategy, assignments, etc of the game (that would require a really intimate knowledge of each team's playing style/strategy).
One alternative streaming cast I would like to see is a "total ice" view that is home team based (for me the Avalanche, for example) where I get more insight into where everyone is on the ice (not just the camera following the puck). To truly grow the game in markets like the US where hockey isn't a primary sport there needs to be better education/understanding of the game.
Someone like me who was introduced to the sport when the Avs showed up, it's been a near 30 year journey in adulthood to watch and learn, then to play the game to be able to really understand it better. It's like an all-or-nothing proposition; not everyone can turn their life over to hunt out that type of information; it shouldn't be a closely guarded secret.
Think about watching rugby, cricket, some obscure but obviously popular and entertaining sport in another country. You can be entertained but you would only get obscure information on what is really going on unless you had access to highly knowledgeable coaches, etc.
What John Madden did on his broadcasts was a multiplying effect for the true knowledge of how football plays and players were expected to perform; now it is so prevelant and the lexicon has grown tremendously because of it. Hockey has so little of that in a broad sense.