Well if it has to be download, it's not user-friendly. Not at all.
It's like writing that early cellular phones were not user friendly as they are not using touch screen, Apps etc.
The voice addition is improvement to the current state, and will add to the game both in combining it to a more multimedia game and making it more alive.
It also will allow users that cannot see a game due to lack of time an ability to know what happens there (and not just the box-score).