Roger was faster in his prime and hit his FH better but now his BH is far more consistent and his serve while it isn't the fastest one in the circuit is incredibly effective due to the fact that he can hit it with any effect and to any corner he wants, it's very difficult to read if he's in a good day.
Also, Annacone has sharpened his net game, he came up 47 times in a 3 set match and we all saw what happened in the Wimbledon final, where he managed to win 68% of his net approaches vs a very good passer like Murray.