Frenchy is cheerful and his experience with the game is a lot more relevant and recent. He's more pleasant to listen to.
I think it's a little more relevant to hear a recent player gripe about the changes in baseball rather than similar things from grumpy old man decades removed from the game. Frenchy legitimately represents the current attitudes of a class of players. That's more helpful than anything.
And he's occasionally funny. Plus his stories about the Braves or guys who recently played rather than George Brett or Robin Yount or whatever. Diminishing returns for those stories these days.