As far as I'm concerned Rosen can be the replacement for Miller....and I've listened to Miller since year 1. Rosen is a no BS kind of guy. No special calls to make himself stand out or none of that nonsense. Whether you put him on radio or TV it doesn't matter. Radio is actually the tougher gig but they can do what they want there. JR did great last year on the radio and did great last night. He's got my vote.
Rosen seemed jittery at first but then seemed to settle right in as the game carried on. I like when commentators have that recognizable and undeniable characteristic in their voice and/or delivery. Maybe in time he will develop it?